997759872 has 96 divisors (see below), whose sum is σ = 2996070480. Its totient is φ = 318117888.

The previous prime is 997759793. The next prime is 997759891. The reversal of 997759872 is 278957799.

997759872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7668 + ... + 45324.

Almost surely, 2^997759872 is an apocalyptic number.

997759872 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997759872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1498035240).

997759872 is an abundant number, since it is smaller than the sum of its proper divisors (1998310608).

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

997759872 is a wasteful number, since it uses less digits than its factorization.

997759872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37700 (or 37685 counting only the distinct ones).

The product of its digits is 20003760, while the sum is 63.

The square root of 997759872 is about 31587.3372097111. The cubic root of 997759872 is about 999.2527323969.

The spelling of 997759872 in words is "nine hundred ninety-seven million, seven hundred fifty-nine thousand, eight hundred seventy-two".