55401928 has 16 divisors (see below), whose sum is σ = 104455260. Its totient is φ = 27547200.

The previous prime is 55401889. The next prime is 55401937. The reversal of 55401928 is 82910455.

It can be written as a sum of positive squares in 2 ways, for example, as 55086084 + 315844 = 7422^2 + 562^2 .

It is a super-2 number, since 2×55401928² = 6138747252234368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55401893 and 55401902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17683 + ... + 20578.

Almost surely, 2^55401928 is an apocalyptic number.

It is an amenable number.

55401928 is a deficient number, since it is larger than the sum of its proper divisors (49053332).

55401928 is a wasteful number, since it uses less digits than its factorization.

55401928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38448 (or 38444 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 55401928 is about 7443.2471408653. The cubic root of 55401928 is about 381.2193701810.

The spelling of 55401928 in words is "fifty-five million, four hundred one thousand, nine hundred twenty-eight".