56440690 has 16 divisors (see below), whose sum is σ = 101680920. Its totient is φ = 22556800.

The previous prime is 56440673. The next prime is 56440717. The reversal of 56440690 is 9604465.

It can be written as a sum of positive squares in 4 ways, for example, as 13315201 + 43125489 = 3649^2 + 6567^2 .

It is a super-2 number, since 2×56440690² = 6371102975352200, which contains 22 as substring.

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, 17526 + ... + 20494.

Almost surely, 2^56440690 is an apocalyptic number.

56440690 is a deficient number, since it is larger than the sum of its proper divisors (45240230).

56440690 is a wasteful number, since it uses less digits than its factorization.

56440690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4877.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 56440690 is about 7512.7019107642. The cubic root of 56440690 is about 383.5871983587.

The spelling of 56440690 in words is "fifty-six million, four hundred forty thousand, six hundred ninety".