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23555420 = 2257168253
BaseRepresentation
bin101100111011…
…0110101011100
31122022201221222
41121312311130
522012233140
62200512512
7404134460
oct131666534
948281858
1023555420
1112329599
127a7b738
134b59825
1431b24a0
1521045b5
hex1676d5c

23555420 has 24 divisors (see below), whose sum is σ = 56533344. Its totient is φ = 8076096.

The previous prime is 23555419. The next prime is 23555429. The reversal of 23555420 is 2455532.

It is a super-2 number, since 2×235554202 = 1109715622752800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23555420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23555429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83987 + ... + 84266.

It is an arithmetic number, because the mean of its divisors is an integer number (2355556).

Almost surely, 223555420 is an apocalyptic number.

23555420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23555420 is an abundant number, since it is smaller than the sum of its proper divisors (32977924).

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

23555420 is a wasteful number, since it uses less digits than its factorization.

23555420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168269 (or 168267 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 23555420 is about 4853.3926278429. The cubic root of 23555420 is about 286.6577035837.

It can be divided in two parts, 235 and 55420, that added together give a palindrome (55655).

The spelling of 23555420 in words is "twenty-three million, five hundred fifty-five thousand, four hundred twenty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 168253 336506 673012 841265 1177771 1682530 2355542 3365060 4711084 5888855 11777710 23555420