56657740 has 24 divisors (see below), whose sum is σ = 124155360. Its totient is φ = 21677568.

The previous prime is 56657729. The next prime is 56657743. The reversal of 56657740 is 4775665.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 56657693 and 56657702.

It is not an unprimeable number, because it can be changed into a prime (56657743) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 61125 + ... + 62044.

It is an arithmetic number, because the mean of its divisors is an integer number (5173140).

Almost surely, 2^56657740 is an apocalyptic number.

It is an amenable number.

56657740 is an abundant number, since it is smaller than the sum of its proper divisors (67497620).

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

56657740 is a wasteful number, since it uses less digits than its factorization.

56657740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123201 (or 123199 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 56657740 is about 7527.1335845725. The cubic root of 56657740 is about 384.0782808435.

The spelling of 56657740 in words is "fifty-six million, six hundred fifty-seven thousand, seven hundred forty".