55328816 has 20 divisors (see below), whose sum is σ = 107914224. Its totient is φ = 27480000.

The previous prime is 55328807. The next prime is 55328821. The reversal of 55328816 is 61882355.

It is a super-2 number, since 2×55328816² = 6122555759923712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55328816.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9035 + ... + 13866.

Almost surely, 2^55328816 is an apocalyptic number.

It is an amenable number.

55328816 is a deficient number, since it is larger than the sum of its proper divisors (52585408).

55328816 is a wasteful number, since it uses less digits than its factorization.

55328816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23060 (or 23054 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 55328816 is about 7438.3342221226. The cubic root of 55328816 is about 381.0516023732.

The spelling of 55328816 in words is "fifty-five million, three hundred twenty-eight thousand, eight hundred sixteen".