56891280 has 80 divisors (see below), whose sum is σ = 178185024. Its totient is φ = 15014400.

The previous prime is 56891269. The next prime is 56891323. The reversal of 56891280 is 8219865.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23067 + ... + 25413.

Almost surely, 2^56891280 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 56891280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89092512).

56891280 is an abundant number, since it is smaller than the sum of its proper divisors (121293744).

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

56891280 is a wasteful number, since it uses less digits than its factorization.

56891280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464 (or 2458 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 56891280 is about 7542.6308407611. The cubic root of 56891280 is about 384.6052737445.

The spelling of 56891280 in words is "fifty-six million, eight hundred ninety-one thousand, two hundred eighty".