55988690 has 16 divisors (see below), whose sum is σ = 100916928. Its totient is φ = 22364976.

The previous prime is 55988677. The next prime is 55988711. The reversal of 55988690 is 9688955.

It is a happy number.

55988690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55988690² = 6269466815832200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4829 + ... + 11631.

It is an arithmetic number, because the mean of its divisors is an integer number (6307308).

Almost surely, 2^55988690 is an apocalyptic number.

55988690 is a deficient number, since it is larger than the sum of its proper divisors (44928238).

55988690 is a wasteful number, since it uses less digits than its factorization.

55988690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7633.

The product of its (nonzero) digits is 777600, while the sum is 50.

The square root of 55988690 is about 7482.5590542274. The cubic root of 55988690 is about 382.5604785683.

The spelling of 55988690 in words is "fifty-five million, nine hundred eighty-eight thousand, six hundred ninety".