997794120 has 64 divisors (see below), whose sum is σ = 3150936000. Its totient is φ = 252073728.

The previous prime is 997794113. The next prime is 997794121. The reversal of 997794120 is 21497799.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 997794120.

It is not an unprimeable number, because it can be changed into a prime (997794121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216535 + ... + 221094.

It is an arithmetic number, because the mean of its divisors is an integer number (49233375).

Almost surely, 2^997794120 is an apocalyptic number.

It is an amenable number.

997794120 is an abundant number, since it is smaller than the sum of its proper divisors (2153141880).

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

997794120 is a wasteful number, since it uses less digits than its factorization.

997794120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437662 (or 437658 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 48.

The square root of 997794120 is about 31587.8793210307. The cubic root of 997794120 is about 999.2641653468.

The spelling of 997794120 in words is "nine hundred ninety-seven million, seven hundred ninety-four thousand, one hundred twenty".