88221990 has 16 divisors (see below), whose sum is σ = 211732848. Its totient is φ = 23525856.

The previous prime is 88221983. The next prime is 88222009. The reversal of 88221990 is 9912288.

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, 1470337 + ... + 1470396.

It is an arithmetic number, because the mean of its divisors is an integer number (13233303).

Almost surely, 2^88221990 is an apocalyptic number.

88221990 is an abundant number, since it is smaller than the sum of its proper divisors (123510858).

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

88221990 is a wasteful number, since it uses less digits than its factorization.

88221990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940743.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 88221990 is about 9392.6561738413. The cubic root of 88221990 is about 445.1697202213.

The spelling of 88221990 in words is "eighty-eight million, two hundred twenty-one thousand, nine hundred ninety".