97930728 has 128 divisors (see below), whose sum is σ = 313344000. Its totient is φ = 27760320.

The previous prime is 97930717. The next prime is 97930733. The reversal of 97930728 is 82703979.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361233 + ... + 361503.

It is an arithmetic number, because the mean of its divisors is an integer number (2448000).

Almost surely, 2^97930728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97930728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156672000).

97930728 is an abundant number, since it is smaller than the sum of its proper divisors (215413272).

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

97930728 is a wasteful number, since it uses less digits than its factorization.

97930728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 97930728 is about 9895.9955537581. The cubic root of 97930728 is about 460.9349729395.

The spelling of 97930728 in words is "ninety-seven million, nine hundred thirty thousand, seven hundred twenty-eight".