56297640 has 64 divisors (see below), whose sum is σ = 193023360. Its totient is φ = 12867840.

The previous prime is 56297639. The next prime is 56297663. The reversal of 56297640 is 4679265.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 32671 + ... + 34350.

It is an arithmetic number, because the mean of its divisors is an integer number (3015990).

Almost surely, 2^56297640 is an apocalyptic number.

It is an amenable number.

56297640 is an abundant number, since it is smaller than the sum of its proper divisors (136725720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56297640 is a wasteful number, since it uses less digits than its factorization.

56297640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67042 (or 67038 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 56297640 is about 7503.1753278195. The cubic root of 56297640 is about 383.2628545075.

The spelling of 56297640 in words is "fifty-six million, two hundred ninety-seven thousand, six hundred forty".