997798732 has 12 divisors (see below), whose sum is σ = 1995597520. Its totient is φ = 427628016.

The previous prime is 997798729. The next prime is 997798771. The reversal of 997798732 is 237897799.

997798732 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17817807 + ... + 17817862.

Almost surely, 2^997798732 is an apocalyptic number.

It is an amenable number.

997798732 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

997798732 is a wasteful number, since it uses less digits than its factorization.

997798732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35635680 (or 35635678 counting only the distinct ones).

The product of its digits is 12002256, while the sum is 61.

The square root of 997798732 is about 31587.9523236312. The cubic root of 997798732 is about 999.2657049427.

The spelling of 997798732 in words is "nine hundred ninety-seven million, seven hundred ninety-eight thousand, seven hundred thirty-two".