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23801680 = 2457192237
BaseRepresentation
bin101101011001…
…0111101010000
31122210020202201
41122302331100
522043123210
62210052544
7406211440
oct132627520
948706681
1023801680
1112487611
127b7a154
134c14946
143238120
15215253a
hex16b2f50

23801680 has 80 divisors (see below), whose sum is σ = 66602880. Its totient is φ = 7727616.

The previous prime is 23801653. The next prime is 23801719. The reversal of 23801680 is 8610832.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9522 + ... + 11758.

It is an arithmetic number, because the mean of its divisors is an integer number (832536).

Almost surely, 223801680 is an apocalyptic number.

23801680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23801680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33301440).

23801680 is an abundant number, since it is smaller than the sum of its proper divisors (42801200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23801680 is a wasteful number, since it uses less digits than its factorization.

23801680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276 (or 2270 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 23801680 is about 4878.6965472347. The cubic root of 23801680 is about 287.6531962367.

The spelling of 23801680 in words is "twenty-three million, eight hundred one thousand, six hundred eighty".

Divisors: 1 2 4 5 7 8 10 14 16 19 20 28 35 38 40 56 70 76 80 95 112 133 140 152 190 266 280 304 380 532 560 665 760 1064 1330 1520 2128 2237 2660 4474 5320 8948 10640 11185 15659 17896 22370 31318 35792 42503 44740 62636 78295 85006 89480 125272 156590 170012 178960 212515 250544 297521 313180 340024 425030 595042 626360 680048 850060 1190084 1252720 1487605 1700120 2380168 2975210 3400240 4760336 5950420 11900840 23801680