56287990 has 32 divisors (see below), whose sum is σ = 111468960. Its totient is φ = 20463520.

The previous prime is 56287967. The next prime is 56287991. The reversal of 56287990 is 9978265.

It is a self number, because there is not a number n which added to its sum of digits gives 56287990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56287991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11196 + ... + 15424.

It is an arithmetic number, because the mean of its divisors is an integer number (3483405).

Almost surely, 2^56287990 is an apocalyptic number.

56287990 is a deficient number, since it is larger than the sum of its proper divisors (55180970).

56287990 is a wasteful number, since it uses less digits than its factorization.

56287990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269 (or 4247 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 56287990 is about 7502.5322391843. The cubic root of 56287990 is about 383.2409548454.

The spelling of 56287990 in words is "fifty-six million, two hundred eighty-seven thousand, nine hundred ninety".