88231990 has 64 divisors (see below), whose sum is σ = 199853568. Its totient is φ = 27471840.

The previous prime is 88231987. The next prime is 88231999. The reversal of 88231990 is 9913288.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88231999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92697 + ... + 93643.

It is an arithmetic number, because the mean of its divisors is an integer number (3122712).

Almost surely, 2^88231990 is an apocalyptic number.

88231990 is an abundant number, since it is smaller than the sum of its proper divisors (111621578).

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

88231990 is a wasteful number, since it uses less digits than its factorization.

88231990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994 (or 972 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 88231990 is about 9393.1884895386. The cubic root of 88231990 is about 445.1865396448.

The spelling of 88231990 in words is "eighty-eight million, two hundred thirty-one thousand, nine hundred ninety".