997657272 has 48 divisors (see below), whose sum is σ = 2703486240. Its totient is φ = 332368128.

The previous prime is 997657249. The next prime is 997657273. The reversal of 997657272 is 272756799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997657273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206193 + ... + 210975.

It is an arithmetic number, because the mean of its divisors is an integer number (56322630).

Almost surely, 2^997657272 is an apocalyptic number.

It is an amenable number.

997657272 is an abundant number, since it is smaller than the sum of its proper divisors (1705828968).

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

997657272 is a wasteful number, since it uses less digits than its factorization.

997657272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7692 (or 7685 counting only the distinct ones).

The product of its digits is 3333960, while the sum is 54.

The square root of 997657272 is about 31585.7130994379. The cubic root of 997657272 is about 999.2184800523.

The spelling of 997657272 in words is "nine hundred ninety-seven million, six hundred fifty-seven thousand, two hundred seventy-two".