56620857 has 8 divisors (see below), whose sum is σ = 76404384. Its totient is φ = 37292288.

The previous prime is 56620807. The next prime is 56620891. The reversal of 56620857 is 75802665.

It is a happy number.

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 56620857 - 2⁶ = 56620793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56620807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113448 + ... + 113945.

It is an arithmetic number, because the mean of its divisors is an integer number (9550548).

Almost surely, 2^56620857 is an apocalyptic number.

It is an amenable number.

56620857 is a deficient number, since it is larger than the sum of its proper divisors (19783527).

56620857 is a wasteful number, since it uses less digits than its factorization.

56620857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227479.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 56620857 is about 7524.6831826995. The cubic root of 56620857 is about 383.9949204515.

The spelling of 56620857 in words is "fifty-six million, six hundred twenty thousand, eight hundred fifty-seven".