55728474 has 16 divisors (see below), whose sum is σ = 111938112. Its totient is φ = 18495968.

The previous prime is 55728469. The next prime is 55728479. The reversal of 55728474 is 47482755.

55728474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55728469) and next prime (55728479).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55728479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18534 + ... + 21329.

It is an arithmetic number, because the mean of its divisors is an integer number (6996132).

Almost surely, 2^55728474 is an apocalyptic number.

55728474 is an abundant number, since it is smaller than the sum of its proper divisors (56209638).

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

55728474 is a wasteful number, since it uses less digits than its factorization.

55728474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40101.

The product of its digits is 313600, while the sum is 42.

The square root of 55728474 is about 7465.1506347829. The cubic root of 55728474 is about 381.9668885712.

The spelling of 55728474 in words is "fifty-five million, seven hundred twenty-eight thousand, four hundred seventy-four".