997280872 has 16 divisors (see below), whose sum is σ = 2137030560. Its totient is φ = 427406064.

The previous prime is 997280857. The next prime is 997280899. The reversal of 997280872 is 278082799.

997280872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8904238 + ... + 8904349.

It is an arithmetic number, because the mean of its divisors is an integer number (133564410).

Almost surely, 2^997280872 is an apocalyptic number.

It is an amenable number.

997280872 is an abundant number, since it is smaller than the sum of its proper divisors (1139749688).

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

997280872 is a wasteful number, since it uses less digits than its factorization.

997280872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17808600 (or 17808596 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 997280872 is about 31579.7541472381. The cubic root of 997280872 is about 999.0928012393.

The spelling of 997280872 in words is "nine hundred ninety-seven million, two hundred eighty thousand, eight hundred seventy-two".