999899588 has 12 divisors (see below), whose sum is σ = 1757534352. Its totient is φ = 497746920.

The previous prime is 999899587. The next prime is 999899627. The reversal of 999899588 is 885998999.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (999899587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549698 + ... + 551513.

It is an arithmetic number, because the mean of its divisors is an integer number (146461196).

Almost surely, 2^999899588 is an apocalyptic number.

It is an amenable number.

999899588 is a deficient number, since it is larger than the sum of its proper divisors (757634764).

999899588 is a wasteful number, since it uses less digits than its factorization.

999899588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101442 (or 1101440 counting only the distinct ones).

The product of its digits is 151165440, while the sum is 74.

The square root of 999899588 is about 31621.1889087049. The cubic root of 999899588 is about 999.9665282130.

The spelling of 999899588 in words is "nine hundred ninety-nine million, eight hundred ninety-nine thousand, five hundred eighty-eight".