997873888 has 96 divisors (see below), whose sum is σ = 2292675840. Its totient is φ = 422492160.

The previous prime is 997873859. The next prime is 997873897. The reversal of 997873888 is 888378799.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615543 + ... + 617161.

It is an arithmetic number, because the mean of its divisors is an integer number (23882040).

Almost surely, 2^997873888 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 997873888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1146337920).

997873888 is an abundant number, since it is smaller than the sum of its proper divisors (1294801952).

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

997873888 is a wasteful number, since it uses less digits than its factorization.

997873888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760 (or 1752 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 67.

The square root of 997873888 is about 31589.1419319994. The cubic root of 997873888 is about 999.2907931445.

The spelling of 997873888 in words is "nine hundred ninety-seven million, eight hundred seventy-three thousand, eight hundred eighty-eight".