997228200 has 96 divisors (see below), whose sum is σ = 3106452960. Its totient is φ = 264633600.

The previous prime is 997228171. The next prime is 997228213. The reversal of 997228200 is 2822799.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122662 + ... + 130538.

It is an arithmetic number, because the mean of its divisors is an integer number (32358885).

Almost surely, 2^997228200 is an apocalyptic number.

997228200 is the 16880-th nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997228200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553226480).

997228200 is an abundant number, since it is smaller than the sum of its proper divisors (2109224760).

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

997228200 is a wasteful number, since it uses less digits than its factorization.

997228200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8107 (or 8098 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 997228200 is about 31578.9201841988. The cubic root of 997228200 is about 999.0752116969.

The spelling of 997228200 in words is "nine hundred ninety-seven million, two hundred twenty-eight thousand, two hundred".