56405504 has 40 divisors (see below), whose sum is σ = 115492608. Its totient is φ = 27504640.

The previous prime is 56405497. The next prime is 56405513. The reversal of 56405504 is 40550465.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19649 + ... + 22335.

Almost surely, 2^56405504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56405504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57746304).

56405504 is an abundant number, since it is smaller than the sum of its proper divisors (59087104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56405504 is an equidigital number, since it uses as much as digits as its factorization.

56405504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746 (or 2730 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 56405504 is about 7510.3597783329. The cubic root of 56405504 is about 383.5074703891.

Adding to 56405504 its reverse (40550465), we get a palindrome (96955969).

The spelling of 56405504 in words is "fifty-six million, four hundred five thousand, five hundred four".