56115280 has 80 divisors (see below), whose sum is σ = 142490880. Its totient is φ = 20427264.

The previous prime is 56115263. The next prime is 56115281. The reversal of 56115280 is 8251165.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56115281) 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, 81819 + ... + 82501.

It is an arithmetic number, because the mean of its divisors is an integer number (1781136).

Almost surely, 2^56115280 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 56115280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71245440).

56115280 is an abundant number, since it is smaller than the sum of its proper divisors (86375600).

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

56115280 is a wasteful number, since it uses less digits than its factorization.

56115280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 782 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 56115280 is about 7491.0132825940. The cubic root of 56115280 is about 382.8485836485.

The spelling of 56115280 in words is "fifty-six million, one hundred fifteen thousand, two hundred eighty".