55628975 has 6 divisors (see below), whose sum is σ = 68979960. Its totient is φ = 44503160.

The previous prime is 55628957. The next prime is 55628977. The reversal of 55628975 is 57982655.

It is not a de Polignac number, because 55628975 - 2²⁰ = 54580399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55628977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1112555 + ... + 1112604.

It is an arithmetic number, because the mean of its divisors is an integer number (11496660).

Almost surely, 2^55628975 is an apocalyptic number.

55628975 is a deficient number, since it is larger than the sum of its proper divisors (13350985).

55628975 is a wasteful number, since it uses less digits than its factorization.

55628975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225169 (or 2225164 counting only the distinct ones).

The product of its digits is 756000, while the sum is 47.

The square root of 55628975 is about 7458.4834249330. The cubic root of 55628975 is about 381.7394287604.

The spelling of 55628975 in words is "fifty-five million, six hundred twenty-eight thousand, nine hundred seventy-five".