55538628 has 48 divisors (see below), whose sum is σ = 136234560. Its totient is φ = 17587584.

The previous prime is 55538627. The next prime is 55538633. The reversal of 55538628 is 82683555.

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

It is a self number, because there is not a number n which added to its sum of digits gives 55538628.

It is not an unprimeable number, because it can be changed into a prime (55538621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17638 + ... + 20546.

It is an arithmetic number, because the mean of its divisors is an integer number (2838220).

Almost surely, 2^55538628 is an apocalyptic number.

It is an amenable number.

55538628 is an abundant number, since it is smaller than the sum of its proper divisors (80695932).

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

55538628 is a wasteful number, since it uses less digits than its factorization.

55538628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996 (or 2994 counting only the distinct ones).

The product of its digits is 288000, while the sum is 42.

The square root of 55538628 is about 7452.4243035404. The cubic root of 55538628 is about 381.5326558198.

The spelling of 55538628 in words is "fifty-five million, five hundred thirty-eight thousand, six hundred twenty-eight".