999897328 has 10 divisors (see below), whose sum is σ = 1937301104. Its totient is φ = 499948656.

The previous prime is 999897277. The next prime is 999897329. The reversal of 999897328 is 823798999.

It is a self number, because there is not a number n which added to its sum of digits gives 999897328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999897329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31246776 + ... + 31246807.

Almost surely, 2^999897328 is an apocalyptic number.

It is an amenable number.

999897328 is a deficient number, since it is larger than the sum of its proper divisors (937403776).

999897328 is a wasteful number, since it uses less digits than its factorization.

999897328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62493591 (or 62493585 counting only the distinct ones).

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

The square root of 999897328 is about 31621.1531731529. The cubic root of 999897328 is about 999.9657748287.

The spelling of 999897328 in words is "nine hundred ninety-nine million, eight hundred ninety-seven thousand, three hundred twenty-eight".