56783990 has 16 divisors (see below), whose sum is σ = 104386752. Its totient is φ = 22230144.

The previous prime is 56783983. The next prime is 56784023. The reversal of 56783990 is 9938765.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59939 + ... + 60878.

It is an arithmetic number, because the mean of its divisors is an integer number (6524172).

Almost surely, 2^56783990 is an apocalyptic number.

56783990 is a deficient number, since it is larger than the sum of its proper divisors (47602762).

56783990 is a wasteful number, since it uses less digits than its factorization.

56783990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120871.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 56783990 is about 7535.5152444939. The cubic root of 56783990 is about 384.3633487556.

The spelling of 56783990 in words is "fifty-six million, seven hundred eighty-three thousand, nine hundred ninety".