56691288 has 96 divisors (see below), whose sum is σ = 167310000. Its totient is φ = 17273088.

The previous prime is 56691263. The next prime is 56691293. The reversal of 56691288 is 88219665.

56691288 is a `hidden beast` number, since 566 + 9 + 1 + 2 + 88 = 666.

It is a congruent number.

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, 38958 + ... + 40386.

Almost surely, 2^56691288 is an apocalyptic number.

56691288 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56691288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83655000).

56691288 is an abundant number, since it is smaller than the sum of its proper divisors (110618712).

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

56691288 is a wasteful number, since it uses less digits than its factorization.

56691288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489 (or 1482 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 56691288 is about 7529.3617259367. The cubic root of 56691288 is about 384.1540722879.

The spelling of 56691288 in words is "fifty-six million, six hundred ninety-one thousand, two hundred eighty-eight".