997904580 has 24 divisors (see below), whose sum is σ = 2794132992. Its totient is φ = 266107872.

The previous prime is 997904561. The next prime is 997904591. The reversal of 997904580 is 85409799.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8315812 + ... + 8315931.

It is an arithmetic number, because the mean of its divisors is an integer number (116422208).

Almost surely, 2^997904580 is an apocalyptic number.

It is an amenable number.

997904580 is an abundant number, since it is smaller than the sum of its proper divisors (1796228412).

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

997904580 is a wasteful number, since it uses less digits than its factorization.

997904580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16631755 (or 16631753 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 997904580 is about 31589.6277281009. The cubic root of 997904580 is about 999.3010382329.

The spelling of 997904580 in words is "nine hundred ninety-seven million, nine hundred four thousand, five hundred eighty".