56806990 has 16 divisors (see below), whose sum is σ = 104182848. Its totient is φ = 22293856.

The previous prime is 56806961. The next prime is 56806991. The reversal of 56806990 is 9960865.

It is a super-2 number, since 2×56806990² = 6454068225720200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56806991) 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, 53062 + ... + 54121.

It is an arithmetic number, because the mean of its divisors is an integer number (6511428).

Almost surely, 2^56806990 is an apocalyptic number.

56806990 is a deficient number, since it is larger than the sum of its proper divisors (47375858).

56806990 is a wasteful number, since it uses less digits than its factorization.

56806990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107243.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 56806990 is about 7537.0411966500. The cubic root of 56806990 is about 384.4152364075.

The spelling of 56806990 in words is "fifty-six million, eight hundred six thousand, nine hundred ninety".