55990864 has 10 divisors (see below), whose sum is σ = 108482330. Its totient is φ = 27995424.

The previous prime is 55990861. The next prime is 55990897. The reversal of 55990864 is 46809955.

It can be written as a sum of positive squares in only one way, i.e., 46131264 + 9859600 = 6792^2 + 3140^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55990861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1749699 + ... + 1749730.

It is an arithmetic number, because the mean of its divisors is an integer number (10848233).

Almost surely, 2^55990864 is an apocalyptic number.

It is an amenable number.

55990864 is a deficient number, since it is larger than the sum of its proper divisors (52491466).

55990864 is a wasteful number, since it uses less digits than its factorization.

55990864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3499437 (or 3499431 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 55990864 is about 7482.7043239727. The cubic root of 55990864 is about 382.5654300190.

The spelling of 55990864 in words is "fifty-five million, nine hundred ninety thousand, eight hundred sixty-four".