88521690 has 32 divisors (see below), whose sum is σ = 213736320. Its totient is φ = 23463104.

The previous prime is 88521689. The next prime is 88521731. The reversal of 88521690 is 9612588.

It is a super-2 number, since 2×88521690² = 15672179200912200, which contains 22 as substring.

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, 3825 + ... + 13844.

It is an arithmetic number, because the mean of its divisors is an integer number (6679260).

Almost surely, 2^88521690 is an apocalyptic number.

88521690 is an abundant number, since it is smaller than the sum of its proper divisors (125214630).

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

88521690 is a wasteful number, since it uses less digits than its factorization.

88521690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17846.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 88521690 is about 9408.5966009815. The cubic root of 88521690 is about 445.6732476364.

The spelling of 88521690 in words is "eighty-eight million, five hundred twenty-one thousand, six hundred ninety".