97211928 has 32 divisors (see below), whose sum is σ = 265124160. Its totient is φ = 29458080.

The previous prime is 97211927. The next prime is 97211951. The reversal of 97211928 is 82911279.

It is a Smith number, since the sum of its digits (39) 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 (97211927) by changing a digit.

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, 183850 + ... + 184377.

It is an arithmetic number, because the mean of its divisors is an integer number (8285130).

Almost surely, 2^97211928 is an apocalyptic number.

It is an amenable number.

97211928 is an abundant number, since it is smaller than the sum of its proper divisors (167912232).

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

97211928 is a wasteful number, since it uses less digits than its factorization.

97211928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368247 (or 368243 counting only the distinct ones).

The product of its digits is 18144, while the sum is 39.

The square root of 97211928 is about 9859.6109456712. The cubic root of 97211928 is about 459.8044663601.

The spelling of 97211928 in words is "ninety-seven million, two hundred eleven thousand, nine hundred twenty-eight".