55621028 has 24 divisors (see below), whose sum is σ = 98794080. Its totient is φ = 27397760.

The previous prime is 55621021. The next prime is 55621031. The reversal of 55621028 is 82012655.

It is not an unprimeable number, because it can be changed into a prime (55621021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93500 + ... + 94092.

It is an arithmetic number, because the mean of its divisors is an integer number (4116420).

Almost surely, 2^55621028 is an apocalyptic number.

It is an amenable number.

55621028 is a deficient number, since it is larger than the sum of its proper divisors (43173052).

55621028 is a wasteful number, since it uses less digits than its factorization.

55621028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 55621028 is about 7457.9506568494. The cubic root of 55621028 is about 381.7212498185.

The spelling of 55621028 in words is "fifty-five million, six hundred twenty-one thousand, twenty-eight".