97220928 has 56 divisors (see below), whose sum is σ = 293981632. Its totient is φ = 27777024.

The previous prime is 97220899. The next prime is 97220947. The reversal of 97220928 is 82902279.

It is a tau number, because it is divible by the number of its divisors (56).

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34825 + ... + 37512.

It is an arithmetic number, because the mean of its divisors is an integer number (5249672).

Almost surely, 2^97220928 is an apocalyptic number.

It is an amenable number.

97220928 is an abundant number, since it is smaller than the sum of its proper divisors (196760704).

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

97220928 is a wasteful number, since it uses less digits than its factorization.

97220928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72359 (or 72349 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 97220928 is about 9860.0673425692. The cubic root of 97220928 is about 459.8186556768.

The spelling of 97220928 in words is "ninety-seven million, two hundred twenty thousand, nine hundred twenty-eight".