997269840 has 160 divisors (see below), whose sum is σ = 3925820160. Its totient is φ = 227943936.

The previous prime is 997269839. The next prime is 997269877. The reversal of 997269840 is 48962799.

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

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 17859 + ... + 48098.

It is an arithmetic number, because the mean of its divisors is an integer number (24536376).

Almost surely, 2^997269840 is an apocalyptic number.

997269840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

997269840 is an abundant number, since it is smaller than the sum of its proper divisors (2928550320).

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

997269840 is a wasteful number, since it uses less digits than its factorization.

997269840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65986 (or 65974 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 997269840 is about 31579.5794778841. The cubic root of 997269840 is about 999.0891172111.

The spelling of 997269840 in words is "nine hundred ninety-seven million, two hundred sixty-nine thousand, eight hundred forty".