56647578 has 32 divisors (see below), whose sum is σ = 123109056. Its totient is φ = 17273088.

The previous prime is 56647561. The next prime is 56647601. The reversal of 56647578 is 87574665.

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, 5601 + ... + 12027.

It is an arithmetic number, because the mean of its divisors is an integer number (3847158).

Almost surely, 2^56647578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56647578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61554528).

56647578 is an abundant number, since it is smaller than the sum of its proper divisors (66461478).

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

56647578 is a wasteful number, since it uses less digits than its factorization.

56647578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6558.

The product of its digits is 1411200, while the sum is 48.

The square root of 56647578 is about 7526.4585297469. The cubic root of 56647578 is about 384.0553170092.

The spelling of 56647578 in words is "fifty-six million, six hundred forty-seven thousand, five hundred seventy-eight".