56990 has 16 divisors (see below), whose sum is σ = 105840. Its totient is φ = 22080.

The previous prime is 56989. The next prime is 56993. The reversal of 56990 is 9965.

56990 = T₁₀ + T₁₁ + ... + T₆₉.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341 + ... + 479.

It is an arithmetic number, because the mean of its divisors is an integer number (6615).

2⁵⁶⁹⁹⁰ is an apocalyptic number.

56990 is a deficient number, since it is larger than the sum of its proper divisors (48850).

56990 is a wasteful number, since it uses less digits than its factorization.

56990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 56990 is about 238.7257841122. The cubic root of 56990 is about 38.4827605957.

The spelling of 56990 in words is "fifty-six thousand, nine hundred ninety".