56211840 has 128 divisors (see below), whose sum is σ = 199144800. Its totient is φ = 14985216.

The previous prime is 56211821. The next prime is 56211863. The reversal of 56211840 is 4811265.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15654 + ... + 18906.

Almost surely, 2^56211840 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 56211840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99572400).

56211840 is an abundant number, since it is smaller than the sum of its proper divisors (142932960).

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

56211840 is a wasteful number, since it uses less digits than its factorization.

56211840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281 (or 3263 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 56211840 is about 7497.4555683912. The cubic root of 56211840 is about 383.0680525431.

The spelling of 56211840 in words is "fifty-six million, two hundred eleven thousand, eight hundred forty".