997242240 has 256 divisors, whose sum is σ = 3334763520. Its totient is φ = 253231104.

The previous prime is 997242229. The next prime is 997242251. The reversal of 997242240 is 42242799.

It is an interprime number because it is at equal distance from previous prime (997242229) and next prime (997242251).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3880192 + ... + 3880448.

It is an arithmetic number, because the mean of its divisors is an integer number (13026420).

Almost surely, 2^997242240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997242240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1667381760).

997242240 is an abundant number, since it is smaller than the sum of its proper divisors (2337521280).

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

997242240 is a wasteful number, since it uses less digits than its factorization.

997242240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 997242240 is about 31579.1424836078. The cubic root of 997242240 is about 999.0799003429.

The spelling of 997242240 in words is "nine hundred ninety-seven million, two hundred forty-two thousand, two hundred forty".