56597778 has 20 divisors (see below), whose sum is σ = 126821310. Its totient is φ = 18865872.

The previous prime is 56597773. The next prime is 56597791. The reversal of 56597778 is 87779565.

56597778 is a `hidden beast` number, since 565 + 9 + 7 + 7 + 78 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44715969 + 11881809 = 6687^2 + 3447^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56597771) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 174523 + ... + 174846.

Almost surely, 2^56597778 is an apocalyptic number.

56597778 is an abundant number, since it is smaller than the sum of its proper divisors (70223532).

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

56597778 is a wasteful number, since it uses less digits than its factorization.

56597778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349383 (or 349374 counting only the distinct ones).

The product of its digits is 3704400, while the sum is 54.

The square root of 56597778 is about 7523.1494734586. The cubic root of 56597778 is about 383.9427404857.

It can be divided in two parts, 56597 and 778, that added together give a palindrome (57375).

The spelling of 56597778 in words is "fifty-six million, five hundred ninety-seven thousand, seven hundred seventy-eight".