56445389 has 64 divisors (see below), whose sum is σ = 83607552. Its totient is φ = 36633600.

The previous prime is 56445379. The next prime is 56445401. The reversal of 56445389 is 98354465.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56445389 is a prime.

It is a super-2 number, since 2×56445389² = 6372163878722642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56445379) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 527474 + ... + 527580.

It is an arithmetic number, because the mean of its divisors is an integer number (1306368).

Almost surely, 2^56445389 is an apocalyptic number.

It is an amenable number.

56445389 is a deficient number, since it is larger than the sum of its proper divisors (27162163).

56445389 is a wasteful number, since it uses less digits than its factorization.

56445389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186.

The product of its digits is 518400, while the sum is 44.

The square root of 56445389 is about 7513.0146412742. The cubic root of 56445389 is about 383.5978433162.

The spelling of 56445389 in words is "fifty-six million, four hundred forty-five thousand, three hundred eighty-nine".