55958990 has 32 divisors (see below), whose sum is σ = 108047520. Its totient is φ = 20801664.

The previous prime is 55958983. The next prime is 55959011. The reversal of 55958990 is 9985955.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7292 + ... + 12848.

It is an arithmetic number, because the mean of its divisors is an integer number (3376485).

Almost surely, 2^55958990 is an apocalyptic number.

55958990 is a deficient number, since it is larger than the sum of its proper divisors (52088530).

55958990 is a wasteful number, since it uses less digits than its factorization.

55958990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5636.

The product of its (nonzero) digits is 729000, while the sum is 50.

The square root of 55958990 is about 7480.5741758237. The cubic root of 55958990 is about 382.4928217144.

The spelling of 55958990 in words is "fifty-five million, nine hundred fifty-eight thousand, nine hundred ninety".