56699280 has 120 divisors (see below), whose sum is σ = 207754560. Its totient is φ = 13743360.

The previous prime is 56699257. The next prime is 56699297. The reversal of 56699280 is 8299665.

56699280 is a `hidden beast` number, since 566 + 9 + 9 + 2 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4341 + ... + 11499.

It is an arithmetic number, because the mean of its divisors is an integer number (1731288).

Almost surely, 2^56699280 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 56699280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103877280).

56699280 is an abundant number, since it is smaller than the sum of its proper divisors (151055280).

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

56699280 is a wasteful number, since it uses less digits than its factorization.

56699280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7189 (or 7180 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 56699280 is about 7529.8924295105. The cubic root of 56699280 is about 384.1721233571.

The spelling of 56699280 in words is "fifty-six million, six hundred ninety-nine thousand, two hundred eighty".