56729988 has 36 divisors (see below), whose sum is σ = 163887360. Its totient is φ = 16208496.

The previous prime is 56729963. The next prime is 56729993. The reversal of 56729988 is 88992765.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112308 + ... + 112811.

Almost surely, 2^56729988 is an apocalyptic number.

It is an amenable number.

56729988 is an abundant number, since it is smaller than the sum of its proper divisors (107157372).

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

56729988 is a wasteful number, since it uses less digits than its factorization.

56729988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225136 (or 225131 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 56729988 is about 7531.9312264518. The cubic root of 56729988 is about 384.2414659687.

It can be divided in two parts, 567 and 29988, that multiplied together give a triangular number (17003196 = T₅₈₃₁).

The spelling of 56729988 in words is "fifty-six million, seven hundred twenty-nine thousand, nine hundred eighty-eight".