56396240 has 80 divisors (see below), whose sum is σ = 136919808. Its totient is φ = 21585408.

The previous prime is 56396233. The next prime is 56396243. The reversal of 56396240 is 4269365.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×56396240² = 6361071772275200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56396240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56396243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199139 + ... + 199421.

Almost surely, 2^56396240 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 56396240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68459904).

56396240 is an abundant number, since it is smaller than the sum of its proper divisors (80523568).

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

56396240 is a wasteful number, since it uses less digits than its factorization.

56396240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 56396240 is about 7509.7430049237. The cubic root of 56396240 is about 383.4864735745.

The spelling of 56396240 in words is "fifty-six million, three hundred ninety-six thousand, two hundred forty".