97128812 has 24 divisors (see below), whose sum is σ = 185786832. Its totient is φ = 44064000.

The previous prime is 97128791. The next prime is 97128821. The reversal of 97128812 is 21882179.

It is a super-2 number, since 2×97128812² = 18868012241062688, which contains 22 as substring.

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, 24608 + ... + 28280.

It is an arithmetic number, because the mean of its divisors is an integer number (7741118).

Almost surely, 2^97128812 is an apocalyptic number.

It is an amenable number.

97128812 is a deficient number, since it is larger than the sum of its proper divisors (88658020).

97128812 is a wasteful number, since it uses less digits than its factorization.

97128812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289 (or 4287 counting only the distinct ones).

The product of its digits is 16128, while the sum is 38.

The square root of 97128812 is about 9855.3950707214. The cubic root of 97128812 is about 459.6733850348.

The spelling of 97128812 in words is "ninety-seven million, one hundred twenty-eight thousand, eight hundred twelve".