97917728 has 24 divisors (see below), whose sum is σ = 193415040. Its totient is φ = 48796480.

The previous prime is 97917727. The next prime is 97917731. The reversal of 97917728 is 82771979.

It is not an unprimeable number, because it can be changed into a prime (97917727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5033 + ... + 14871.

It is an arithmetic number, because the mean of its divisors is an integer number (8058960).

Almost surely, 2^97917728 is an apocalyptic number.

It is an amenable number.

97917728 is a deficient number, since it is larger than the sum of its proper divisors (95497312).

97917728 is a wasteful number, since it uses less digits than its factorization.

97917728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10160 (or 10152 counting only the distinct ones).

The product of its digits is 444528, while the sum is 50.

The square root of 97917728 is about 9895.3387006206. The cubic root of 97917728 is about 460.9145761416.

The spelling of 97917728 in words is "ninety-seven million, nine hundred seventeen thousand, seven hundred twenty-eight".