88717640 has 64 divisors (see below), whose sum is σ = 219274560. Its totient is φ = 32037120.

The previous prime is 88717633. The next prime is 88717663. The reversal of 88717640 is 4671788.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71102 + ... + 72338.

It is an arithmetic number, because the mean of its divisors is an integer number (3426165).

Almost surely, 2^88717640 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 88717640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109637280).

88717640 is an abundant number, since it is smaller than the sum of its proper divisors (130556920).

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

88717640 is a wasteful number, since it uses less digits than its factorization.

88717640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 88717640 is about 9419.0041936502. The cubic root of 88717640 is about 446.0018500195.

The spelling of 88717640 in words is "eighty-eight million, seven hundred seventeen thousand, six hundred forty".