56728377 has 8 divisors (see below), whose sum is σ = 84042080. Its totient is φ = 37818900.

The previous prime is 56728369. The next prime is 56728387. The reversal of 56728377 is 77382765.

56728377 is a `hidden beast` number, since 567 + 2 + 83 + 7 + 7 = 666.

It is not a de Polignac number, because 56728377 - 2³ = 56728369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56728387) 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, 1050499 + ... + 1050552.

It is an arithmetic number, because the mean of its divisors is an integer number (10505260).

Almost surely, 2^56728377 is an apocalyptic number.

It is an amenable number.

56728377 is a deficient number, since it is larger than the sum of its proper divisors (27313703).

56728377 is a wasteful number, since it uses less digits than its factorization.

56728377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101060 (or 2101054 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 56728377 is about 7531.8242810092. The cubic root of 56728377 is about 384.2378287456.

The spelling of 56728377 in words is "fifty-six million, seven hundred twenty-eight thousand, three hundred seventy-seven".