56219440 has 20 divisors (see below), whose sum is σ = 130710384. Its totient is φ = 22487744.

The previous prime is 56219413. The next prime is 56219441. The reversal of 56219440 is 4491265.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (56219441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351292 + ... + 351451.

Almost surely, 2^56219440 is an apocalyptic number.

It is an amenable number.

56219440 is an abundant number, since it is smaller than the sum of its proper divisors (74490944).

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

56219440 is a wasteful number, since it uses less digits than its factorization.

56219440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702756 (or 702750 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 56219440 is about 7497.9623898763. The cubic root of 56219440 is about 383.0853157271.

It can be divided in two parts, 562 and 19440, that added together give a palindrome (20002).

The spelling of 56219440 in words is "fifty-six million, two hundred nineteen thousand, four hundred forty".