97810728 has 16 divisors (see below), whose sum is σ = 244526880. Its totient is φ = 32603568.

The previous prime is 97810693. The next prime is 97810747. The reversal of 97810728 is 82701879.

It is a self number, because there is not a number n which added to its sum of digits gives 97810728.

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 3 ways as a sum of consecutive naturals, for example, 2037700 + ... + 2037747.

It is an arithmetic number, because the mean of its divisors is an integer number (15282930).

Almost surely, 2^97810728 is an apocalyptic number.

It is an amenable number.

97810728 is an abundant number, since it is smaller than the sum of its proper divisors (146716152).

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

97810728 is a wasteful number, since it uses less digits than its factorization.

97810728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075456 (or 4075452 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 97810728 is about 9889.9306367638. The cubic root of 97810728 is about 460.7466261844.

The spelling of 97810728 in words is "ninety-seven million, eight hundred ten thousand, seven hundred twenty-eight".