56724857 has 8 divisors (see below), whose sum is σ = 65188032. Its totient is φ = 48351600.

The previous prime is 56724847. The next prime is 56724859. The reversal of 56724857 is 75842765.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56724857 - 2⁶ = 56724793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56724859) 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, 21119 + ... + 23652.

It is an arithmetic number, because the mean of its divisors is an integer number (8148504).

Almost surely, 2^56724857 is an apocalyptic number.

It is an amenable number.

56724857 is a deficient number, since it is larger than the sum of its proper divisors (8463175).

56724857 is a wasteful number, since it uses less digits than its factorization.

56724857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44959.

The product of its digits is 470400, while the sum is 44.

The square root of 56724857 is about 7531.5906022566. The cubic root of 56724857 is about 384.2298812526.

The spelling of 56724857 in words is "fifty-six million, seven hundred twenty-four thousand, eight hundred fifty-seven".