56778636 has 48 divisors (see below), whose sum is σ = 137823840. Its totient is φ = 18170880.

The previous prime is 56778613. The next prime is 56778641. The reversal of 56778636 is 63687765.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83530 + ... + 84206.

It is an arithmetic number, because the mean of its divisors is an integer number (2871330).

Almost surely, 2^56778636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56778636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68911920).

56778636 is an abundant number, since it is smaller than the sum of its proper divisors (81045204).

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

56778636 is a wasteful number, since it uses less digits than its factorization.

56778636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954 (or 952 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 48.

The square root of 56778636 is about 7535.1599850302. The cubic root of 56778636 is about 384.3512682023.

The spelling of 56778636 in words is "fifty-six million, seven hundred seventy-eight thousand, six hundred thirty-six".