56404420 has 48 divisors (see below), whose sum is σ = 124185600. Its totient is φ = 21490560.

The previous prime is 56404409. The next prime is 56404421. The reversal of 56404420 is 2440465.

56404420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (56404421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45205 + ... + 46435.

It is an arithmetic number, because the mean of its divisors is an integer number (2587200).

Almost surely, 2^56404420 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 56404420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62092800).

56404420 is an abundant number, since it is smaller than the sum of its proper divisors (67781180).

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

56404420 is a wasteful number, since it uses less digits than its factorization.

56404420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 56404420 is about 7510.2876110040. The cubic root of 56404420 is about 383.5050136267.

Adding to 56404420 its reverse (2440465), we get a palindrome (58844885).

The spelling of 56404420 in words is "fifty-six million, four hundred four thousand, four hundred twenty".