55398628 has 24 divisors (see below), whose sum is σ = 101424960. Its totient is φ = 26426400.

The previous prime is 55398611. The next prime is 55398659. The reversal of 55398628 is 82689355.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64063 + ... + 64921.

It is an arithmetic number, because the mean of its divisors is an integer number (4226040).

Almost surely, 2^55398628 is an apocalyptic number.

It is an amenable number.

55398628 is a deficient number, since it is larger than the sum of its proper divisors (46026332).

55398628 is a wasteful number, since it uses less digits than its factorization.

55398628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587 (or 1585 counting only the distinct ones).

The product of its digits is 518400, while the sum is 46.

The square root of 55398628 is about 7443.0254601204. The cubic root of 55398628 is about 381.2118009565.

The spelling of 55398628 in words is "fifty-five million, three hundred ninety-eight thousand, six hundred twenty-eight".