56778534 has 12 divisors (see below), whose sum is σ = 123020196. Its totient is φ = 18926172.

The previous prime is 56778523. The next prime is 56778551. The reversal of 56778534 is 43587765.

56778534 is a `hidden beast` number, since 567 + 7 + 85 + 3 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 56778534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1577164 + ... + 1577199.

It is an arithmetic number, because the mean of its divisors is an integer number (10251683).

Almost surely, 2^56778534 is an apocalyptic number.

56778534 is an abundant number, since it is smaller than the sum of its proper divisors (66241662).

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

56778534 is a wasteful number, since it uses less digits than its factorization.

56778534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154371 (or 3154368 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 56778534 is about 7535.1532167568. The cubic root of 56778534 is about 384.3510380462.

The spelling of 56778534 in words is "fifty-six million, seven hundred seventy-eight thousand, five hundred thirty-four".