56017280 has 128 divisors (see below), whose sum is σ = 149450400. Its totient is φ = 19906560.

The previous prime is 56017231. The next prime is 56017289. The reversal of 56017280 is 8271065.

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

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56017289) 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, 513866 + ... + 513974.

Almost surely, 2^56017280 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 56017280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74725200).

56017280 is an abundant number, since it is smaller than the sum of its proper divisors (93433120).

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

56017280 is a wasteful number, since it uses less digits than its factorization.

56017280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 56017280 is about 7484.4692530600. The cubic root of 56017280 is about 382.6255842348.

The spelling of 56017280 in words is "fifty-six million, seventeen thousand, two hundred eighty".