997399524 has 48 divisors (see below), whose sum is σ = 2548800576. Its totient is φ = 301056000.

The previous prime is 997399499. The next prime is 997399541. The reversal of 997399524 is 425993799.

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, 19224 + ... + 48624.

It is an arithmetic number, because the mean of its divisors is an integer number (53100012).

Almost surely, 2^997399524 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 997399524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1274400288).

997399524 is an abundant number, since it is smaller than the sum of its proper divisors (1551401052).

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

997399524 is a wasteful number, since it uses less digits than its factorization.

997399524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29676 (or 29674 counting only the distinct ones).

The product of its digits is 5511240, while the sum is 57.

The square root of 997399524 is about 31581.6327000363. The cubic root of 997399524 is about 999.1324221931.

The spelling of 997399524 in words is "nine hundred ninety-seven million, three hundred ninety-nine thousand, five hundred twenty-four".