56608409 has 24 divisors (see below), whose sum is σ = 68761152. Its totient is φ = 46163520.

The previous prime is 56608381. The next prime is 56608423. The reversal of 56608409 is 90480665.

It is not a de Polignac number, because 56608409 - 2¹⁶ = 56542873 is a prime.

It is a super-2 number, since 2×56608409² = 6409023939022562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56608439) 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, 68372 + ... + 69194.

It is an arithmetic number, because the mean of its divisors is an integer number (2865048).

Almost surely, 2^56608409 is an apocalyptic number.

It is an amenable number.

56608409 is a deficient number, since it is larger than the sum of its proper divisors (12152743).

56608409 is a wasteful number, since it uses less digits than its factorization.

56608409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 884 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 56608409 is about 7523.8559927739. The cubic root of 56608409 is about 383.9667781770.

The spelling of 56608409 in words is "fifty-six million, six hundred eight thousand, four hundred nine".