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22814428 = 22713233269
BaseRepresentation
bin101011100000…
…1111011011100
31120221002111211
41113001323130
521320030203
62132554204
7364630240
oct127017334
946832454
1022814428
11119728aa
127782964
13495a480
14305c420
152009c6d
hex15c1edc

22814428 has 48 divisors (see below), whose sum is σ = 49533120. Its totient is φ = 8953344.

The previous prime is 22814423. The next prime is 22814437. The reversal of 22814428 is 82441822.

It is a self number, because there is not a number n which added to its sum of digits gives 22814428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22814423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84678 + ... + 84946.

It is an arithmetic number, because the mean of its divisors is an integer number (1031940).

Almost surely, 222814428 is an apocalyptic number.

22814428 is a gapful number since it is divisible by the number (28) 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 22814428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24766560).

22814428 is an abundant number, since it is smaller than the sum of its proper divisors (26718692).

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

22814428 is a wasteful number, since it uses less digits than its factorization.

22814428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 524 counting only the distinct ones).

The product of its digits is 8192, while the sum is 31.

The square root of 22814428 is about 4776.4451216360. The cubic root of 22814428 is about 283.6197881080.

The spelling of 22814428 in words is "twenty-two million, eight hundred fourteen thousand, four hundred twenty-eight".

Divisors: 1 2 4 7 13 14 26 28 52 91 182 233 269 364 466 538 932 1076 1631 1883 3029 3262 3497 3766 6058 6524 6994 7532 12116 13988 21203 24479 42406 48958 62677 84812 97916 125354 250708 438739 814801 877478 1629602 1754956 3259204 5703607 11407214 22814428