997848240 has 160 divisors (see below), whose sum is σ = 3217294080. Its totient is φ = 255532032.

The previous prime is 997848217. The next prime is 997848253. The reversal of 997848240 is 42848799.

It is a super-2 number, since 2×997848240² = 1991402220142195200, which contains 22 as substring.

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, 2136487 + ... + 2136953.

It is an arithmetic number, because the mean of its divisors is an integer number (20108088).

Almost surely, 2^997848240 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 997848240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1608647040).

997848240 is an abundant number, since it is smaller than the sum of its proper divisors (2219445840).

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

997848240 is a wasteful number, since it uses less digits than its factorization.

997848240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819 (or 813 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The square root of 997848240 is about 31588.7359671133. The cubic root of 997848240 is about 999.2822315985.

The spelling of 997848240 in words is "nine hundred ninety-seven million, eight hundred forty-eight thousand, two hundred forty".