997481180 has 24 divisors (see below), whose sum is σ = 2096397072. Its totient is φ = 398671232.

The previous prime is 997481179. The next prime is 997481197. The reversal of 997481180 is 81184799.

It is a congruent 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, 6224 + ... + 45096.

It is an arithmetic number, because the mean of its divisors is an integer number (87349878).

Almost surely, 2^997481180 is an apocalyptic number.

It is an amenable number.

997481180 is an abundant number, since it is smaller than the sum of its proper divisors (1098915892).

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

997481180 is a wasteful number, since it uses less digits than its factorization.

997481180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40165 (or 40163 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 997481180 is about 31582.9254503125. The cubic root of 997481180 is about 999.1596874059.

The spelling of 997481180 in words is "nine hundred ninety-seven million, four hundred eighty-one thousand, one hundred eighty".