56771982 has 16 divisors (see below), whose sum is σ = 126160080. Its totient is φ = 18923976.

The previous prime is 56771977. The next prime is 56771987. The reversal of 56771982 is 28917765.

56771982 is a `hidden beast` number, since 567 + 7 + 1 + 9 + 82 = 666.

It is an interprime number because it is at equal distance from previous prime (56771977) and next prime (56771987).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56771987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525613 + ... + 525720.

It is an arithmetic number, because the mean of its divisors is an integer number (7885005).

Almost surely, 2^56771982 is an apocalyptic number.

56771982 is an abundant number, since it is smaller than the sum of its proper divisors (69388098).

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

56771982 is a wasteful number, since it uses less digits than its factorization.

56771982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051344 (or 1051338 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 56771982 is about 7534.7184419857. The cubic root of 56771982 is about 384.3362533221.

The spelling of 56771982 in words is "fifty-six million, seven hundred seventy-one thousand, nine hundred eighty-two".