997840896 has 216 divisors, whose sum is σ = 2976557220. Its totient is φ = 297123840.

The previous prime is 997840889. The next prime is 997840897. The reversal of 997840896 is 698048799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997840897) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 32188401 + ... + 32188431.

Almost surely, 2^997840896 is an apocalyptic number.

997840896 is a gapful number since it is divisible by the number (96) 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 997840896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1488278610).

997840896 is an abundant number, since it is smaller than the sum of its proper divisors (1978716324).

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

997840896 is a wasteful number, since it uses less digits than its factorization.

997840896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 60.

The square root of 997840896 is about 31588.6197229319. The cubic root of 997840896 is about 999.2797800745.

The spelling of 997840896 in words is "nine hundred ninety-seven million, eight hundred forty thousand, eight hundred ninety-six".