56445985 has 8 divisors (see below), whose sum is σ = 67807656. Its totient is φ = 45108480.

The previous prime is 56445953. The next prime is 56445989. The reversal of 56445985 is 58954465.

It can be written as a sum of positive squares in 4 ways, for example, as 2099601 + 54346384 = 1449^2 + 7372^2 .

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

It is not a de Polignac number, because 56445985 - 2⁵ = 56445953 is a prime.

It is a super-2 number, since 2×56445985² = 6372298445240450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56445989) 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, 424 + ... + 10633.

It is an arithmetic number, because the mean of its divisors is an integer number (8475957).

Almost surely, 2^56445985 is an apocalyptic number.

It is an amenable number.

56445985 is a deficient number, since it is larger than the sum of its proper divisors (11361671).

56445985 is a wasteful number, since it uses less digits than its factorization.

56445985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12083.

The product of its digits is 864000, while the sum is 46.

The square root of 56445985 is about 7513.0543056736. The cubic root of 56445985 is about 383.5991934324.

The spelling of 56445985 in words is "fifty-six million, four hundred forty-five thousand, nine hundred eighty-five".