997276188 has 24 divisors (see below), whose sum is σ = 2332970640. Its totient is φ = 331569280.

The previous prime is 997276187. The next prime is 997276193. The reversal of 997276188 is 881672799.

It is a super-2 number, since 2×997276188² = 1989119590303622688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997276187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102153 + ... + 111488.

It is an arithmetic number, because the mean of its divisors is an integer number (97207110).

Almost surely, 2^997276188 is an apocalyptic number.

It is an amenable number.

997276188 is an abundant number, since it is smaller than the sum of its proper divisors (1335694452).

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

997276188 is a wasteful number, since it uses less digits than its factorization.

997276188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214037 (or 214035 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 57.

The square root of 997276188 is about 31579.6799857123. The cubic root of 997276188 is about 999.0912370668.

The spelling of 997276188 in words is "nine hundred ninety-seven million, two hundred seventy-six thousand, one hundred eighty-eight".