56004309 has 12 divisors (see below), whose sum is σ = 81638700. Its totient is φ = 36993024.

The previous prime is 56004281. The next prime is 56004317. The reversal of 56004309 is 90340065.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31472100 + 24532209 = 5610^2 + 4953^2 .

It is not a de Polignac number, because 56004309 - 2⁷ = 56004181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56004329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27564 + ... + 29525.

It is an arithmetic number, because the mean of its divisors is an integer number (6803225).

Almost surely, 2^56004309 is an apocalyptic number.

It is an amenable number.

56004309 is a deficient number, since it is larger than the sum of its proper divisors (25634391).

56004309 is a wasteful number, since it uses less digits than its factorization.

56004309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57204 (or 57201 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 56004309 is about 7483.6026751826. The cubic root of 56004309 is about 382.5960491843.

The spelling of 56004309 in words is "fifty-six million, four thousand, three hundred nine".