55790628 has 12 divisors (see below), whose sum is σ = 130178160. Its totient is φ = 18596872.

The previous prime is 55790621. The next prime is 55790633. The reversal of 55790628 is 82609755.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×55790628² = 6225188345268768, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 55790628.

It is not an unprimeable number, because it can be changed into a prime (55790621) 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 in 3 ways as a sum of consecutive naturals, for example, 2324598 + ... + 2324621.

It is an arithmetic number, because the mean of its divisors is an integer number (10848180).

Almost surely, 2^55790628 is an apocalyptic number.

It is an amenable number.

55790628 is an abundant number, since it is smaller than the sum of its proper divisors (74387532).

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

55790628 is a wasteful number, since it uses less digits than its factorization.

55790628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4649226 (or 4649224 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 55790628 is about 7469.3124181547. The cubic root of 55790628 is about 382.1088384442.

The spelling of 55790628 in words is "fifty-five million, seven hundred ninety thousand, six hundred twenty-eight".