88221720 has 32 divisors (see below), whose sum is σ = 264665520. Its totient is φ = 23525760.

The previous prime is 88221719. The next prime is 88221739. The reversal of 88221720 is 2712288.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 367471 + ... + 367710.

Almost surely, 2^88221720 is an apocalyptic number.

It is an amenable number.

88221720 is an abundant number, since it is smaller than the sum of its proper divisors (176443800).

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

88221720 is a wasteful number, since it uses less digits than its factorization.

88221720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735195 (or 735191 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 88221720 is about 9392.6418008993. The cubic root of 88221720 is about 445.1692660793.

The spelling of 88221720 in words is "eighty-eight million, two hundred twenty-one thousand, seven hundred twenty".