997270540 has 36 divisors (see below), whose sum is σ = 2436191856. Its totient is φ = 341920992.

The previous prime is 997270513. The next prime is 997270553. The reversal of 997270540 is 45072799.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 507832 + ... + 509791.

It is an arithmetic number, because the mean of its divisors is an integer number (67671996).

Almost surely, 2^997270540 is an apocalyptic number.

It is an amenable number.

997270540 is an abundant number, since it is smaller than the sum of its proper divisors (1438921316).

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

997270540 is a wasteful number, since it uses less digits than its factorization.

997270540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017646 (or 1017637 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 997270540 is about 31579.5905609937. The cubic root of 997270540 is about 999.0893509701.

The spelling of 997270540 in words is "nine hundred ninety-seven million, two hundred seventy thousand, five hundred forty".