997276158 has 32 divisors (see below), whose sum is σ = 2217726720. Its totient is φ = 332191800.

The previous prime is 997276103. The next prime is 997276177. The reversal of 997276158 is 851672799.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

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, 82183 + ... + 93533.

It is an arithmetic number, because the mean of its divisors is an integer number (69303960).

Almost surely, 2^997276158 is an apocalyptic number.

997276158 is an abundant number, since it is smaller than the sum of its proper divisors (1220450562).

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

997276158 is a wasteful number, since it uses less digits than its factorization.

997276158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12989 (or 12983 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 997276158 is about 31579.6795107233. The cubic root of 997276158 is about 999.0912270486.

The spelling of 997276158 in words is "nine hundred ninety-seven million, two hundred seventy-six thousand, one hundred fifty-eight".