997998232 has 64 divisors (see below), whose sum is σ = 2367901440. Its totient is φ = 383011200.

The previous prime is 997998187. The next prime is 997998251. The reversal of 997998232 is 232899799.

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, 29182 + ... + 53362.

It is an arithmetic number, because the mean of its divisors is an integer number (36998460).

Almost surely, 2^997998232 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 997998232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1183950720).

997998232 is an abundant number, since it is smaller than the sum of its proper divisors (1369903208).

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

997998232 is a wasteful number, since it uses less digits than its factorization.

997998232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24272 (or 24268 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 58.

The square root of 997998232 is about 31591.1100153192. The cubic root of 997998232 is about 999.3322982736.

The spelling of 997998232 in words is "nine hundred ninety-seven million, nine hundred ninety-eight thousand, two hundred thirty-two".