88831640 has 32 divisors (see below), whose sum is σ = 206766000. Its totient is φ = 34306944.

The previous prime is 88831637. The next prime is 88831667. The reversal of 88831640 is 4613888.

88831640 = 1014² + 1015² + ... + 1093².

It is a junction number, because it is equal to n+sod(n) for n = 88831594 and 88831603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37130 + ... + 39449.

Almost surely, 2^88831640 is an apocalyptic number.

It is an amenable number.

88831640 is an abundant number, since it is smaller than the sum of its proper divisors (117934360).

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

88831640 is a wasteful number, since it uses less digits than its factorization.

88831640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76619 (or 76615 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 88831640 is about 9425.0538460000. The cubic root of 88831640 is about 446.1928020803.

The spelling of 88831640 in words is "eighty-eight million, eight hundred thirty-one thousand, six hundred forty".