999397288 has 16 divisors (see below), whose sum is σ = 1955342880. Its totient is φ = 477972528.

The previous prime is 999397277. The next prime is 999397337. The reversal of 999397288 is 882793999.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2715570 + ... + 2715937.

It is an arithmetic number, because the mean of its divisors is an integer number (122208930).

Almost surely, 2^999397288 is an apocalyptic number.

It is an amenable number.

999397288 is a deficient number, since it is larger than the sum of its proper divisors (955945592).

999397288 is a wasteful number, since it uses less digits than its factorization.

999397288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431536 (or 5431532 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 64.

The square root of 999397288 is about 31613.2454518672. The cubic root of 999397288 is about 999.7990556241.

The spelling of 999397288 in words is "nine hundred ninety-nine million, three hundred ninety-seven thousand, two hundred eighty-eight".