56987520 has 128 divisors (see below), whose sum is σ = 184775040. Its totient is φ = 14936064.

The previous prime is 56987509. The next prime is 56987527. The reversal of 56987520 is 2578965.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56987527) 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, 128419 + ... + 128861.

It is an arithmetic number, because the mean of its divisors is an integer number (1443555).

Almost surely, 2^56987520 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 56987520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92387520).

56987520 is an abundant number, since it is smaller than the sum of its proper divisors (127787520).

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

56987520 is a wasteful number, since it uses less digits than its factorization.

56987520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 56987520 is about 7549.0078818345. The cubic root of 56987520 is about 384.8220237710.

The spelling of 56987520 in words is "fifty-six million, nine hundred eighty-seven thousand, five hundred twenty".