55981928 has 32 divisors (see below), whose sum is σ = 107011200. Its totient is φ = 27451008.

The previous prime is 55981927. The next prime is 55981943. The reversal of 55981928 is 82918955.

It is not an unprimeable number, because it can be changed into a prime (55981927) 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, 178700 + ... + 179012.

It is an arithmetic number, because the mean of its divisors is an integer number (3344100).

Almost surely, 2^55981928 is an apocalyptic number.

It is an amenable number.

55981928 is a deficient number, since it is larger than the sum of its proper divisors (51029272).

55981928 is a wasteful number, since it uses less digits than its factorization.

55981928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 677 counting only the distinct ones).

The product of its digits is 259200, while the sum is 47.

The square root of 55981928 is about 7482.1071898229. The cubic root of 55981928 is about 382.5450767785.

The spelling of 55981928 in words is "fifty-five million, nine hundred eighty-one thousand, nine hundred twenty-eight".