56777740 has 24 divisors (see below), whose sum is σ = 123080832. Its totient is φ = 21978240.

The previous prime is 56777729. The next prime is 56777761. The reversal of 56777740 is 4777765.

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 7 ways as a sum of consecutive naturals, for example, 45169 + ... + 46408.

It is an arithmetic number, because the mean of its divisors is an integer number (5128368).

Almost surely, 2^56777740 is an apocalyptic number.

It is an amenable number.

56777740 is an abundant number, since it is smaller than the sum of its proper divisors (66303092).

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

56777740 is a wasteful number, since it uses less digits than its factorization.

56777740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91617 (or 91615 counting only the distinct ones).

The product of its (nonzero) digits is 288120, while the sum is 43.

The square root of 56777740 is about 7535.1005301854. The cubic root of 56777740 is about 384.3492464293.

The spelling of 56777740 in words is "fifty-six million, seven hundred seventy-seven thousand, seven hundred forty".