56309409 has 24 divisors (see below), whose sum is σ = 87999912. Its totient is φ = 34490880.

The previous prime is 56309401. The next prime is 56309417. The reversal of 56309409 is 90490365.

56309409 is a `hidden beast` number, since 563 + 0 + 94 + 0 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (56309401) and next prime (56309417).

It can be written as a sum of positive squares in 4 ways, for example, as 14400 + 56295009 = 120^2 + 7503^2 .

It is not a de Polignac number, because 56309409 - 2³ = 56309401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56309401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27199 + ... + 29195.

It is an arithmetic number, because the mean of its divisors is an integer number (3666663).

Almost surely, 2^56309409 is an apocalyptic number.

It is an amenable number.

56309409 is a deficient number, since it is larger than the sum of its proper divisors (31690503).

56309409 is a wasteful number, since it uses less digits than its factorization.

56309409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257 (or 2254 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 56309409 is about 7503.9595547951. The cubic root of 56309409 is about 383.2895596309.

The spelling of 56309409 in words is "fifty-six million, three hundred nine thousand, four hundred nine".