56857985 has 8 divisors (see below), whose sum is σ = 68279976. Its totient is φ = 45452800.

The previous prime is 56857973. The next prime is 56857987. The reversal of 56857985 is 58975865.

It can be written as a sum of positive squares in 4 ways, for example, as 16459249 + 40398736 = 4057^2 + 6356^2 .

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

It is not a de Polignac number, because 56857985 - 2¹⁴ = 56841601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56857987) 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, 5135 + ... + 11835.

It is an arithmetic number, because the mean of its divisors is an integer number (8534997).

Almost surely, 2^56857985 is an apocalyptic number.

It is an amenable number.

56857985 is a deficient number, since it is larger than the sum of its proper divisors (11421991).

56857985 is a wasteful number, since it uses less digits than its factorization.

56857985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8403.

The product of its digits is 3024000, while the sum is 53.

The square root of 56857985 is about 7540.4233966005. The cubic root of 56857985 is about 384.5302304251.

The spelling of 56857985 in words is "fifty-six million, eight hundred fifty-seven thousand, nine hundred eighty-five".