999989862 has 32 divisors (see below), whose sum is σ = 2013258240. Its totient is φ = 331124640.

The previous prime is 999989857. The next prime is 999989863. The reversal of 999989862 is 268989999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999989863) 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, 978912 + ... + 979932.

It is an arithmetic number, because the mean of its divisors is an integer number (62914320).

Almost surely, 2^999989862 is an apocalyptic number.

999989862 is an abundant number, since it is smaller than the sum of its proper divisors (1013268378).

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

999989862 is a wasteful number, since it uses less digits than its factorization.

999989862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948.

The product of its digits is 45349632, while the sum is 69.

The square root of 999989862 is about 31622.6163054229. The cubic root of 999989862 is about 999.9966206552.

The spelling of 999989862 in words is "nine hundred ninety-nine million, nine hundred eighty-nine thousand, eight hundred sixty-two".