56440872 has 48 divisors (see below), whose sum is σ = 153865140. Its totient is φ = 18690048.

The previous prime is 56440861. The next prime is 56440877. The reversal of 56440872 is 27804465.

56440872 is a `hidden beast` number, since 5 + 644 + 0 + 8 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 54552996 + 1887876 = 7386^2 + 1374^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56440877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8808 + ... + 13800.

Almost surely, 2^56440872 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 56440872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76932570).

56440872 is an abundant number, since it is smaller than the sum of its proper divisors (97424268).

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

56440872 is a wasteful number, since it uses less digits than its factorization.

56440872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5162 (or 5155 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 56440872 is about 7512.7140235736. The cubic root of 56440872 is about 383.5876106665.

The spelling of 56440872 in words is "fifty-six million, four hundred forty thousand, eight hundred seventy-two".