55905728 has 14 divisors (see below), whose sum is σ = 110938056. Its totient is φ = 27952832.

The previous prime is 55905721. The next prime is 55905737. The reversal of 55905728 is 82750955.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55905721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436700 + ... + 436827.

Almost surely, 2^55905728 is an apocalyptic number.

It is an amenable number.

55905728 is a deficient number, since it is larger than the sum of its proper divisors (55032328).

55905728 is an equidigital number, since it uses as much as digits as its factorization.

55905728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873539 (or 873529 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 41.

The square root of 55905728 is about 7477.0133074644. The cubic root of 55905728 is about 382.3714304385.

The spelling of 55905728 in words is "fifty-five million, nine hundred five thousand, seven hundred twenty-eight".