97188220 has 48 divisors (see below), whose sum is σ = 209327328. Its totient is φ = 37889280.

The previous prime is 97188209. The next prime is 97188239. The reversal of 97188220 is 2288179.

It is a self number, because there is not a number n which added to its sum of digits gives 97188220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293455 + ... + 293785.

It is an arithmetic number, because the mean of its divisors is an integer number (4360986).

Almost surely, 2^97188220 is an apocalyptic number.

It is an amenable number.

97188220 is an abundant number, since it is smaller than the sum of its proper divisors (112139108).

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

97188220 is a wasteful number, since it uses less digits than its factorization.

97188220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 97188220 is about 9858.4085936829. The cubic root of 97188220 is about 459.7670843542.

The spelling of 97188220 in words is "ninety-seven million, one hundred eighty-eight thousand, two hundred twenty".