999863490 has 16 divisors (see below), whose sum is σ = 2399672448. Its totient is φ = 266630256.

The previous prime is 999863489. The next prime is 999863587. The reversal of 999863490 is 94368999.

999863490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 999863490.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16664362 + ... + 16664421.

It is an arithmetic number, because the mean of its divisors is an integer number (149979528).

Almost surely, 2^999863490 is an apocalyptic number.

999863490 is an abundant number, since it is smaller than the sum of its proper divisors (1399808958).

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

999863490 is a wasteful number, since it uses less digits than its factorization.

999863490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33328793.

The product of its (nonzero) digits is 3779136, while the sum is 57.

The square root of 999863490 is about 31620.6181154006. The cubic root of 999863490 is about 999.9544945960.

The spelling of 999863490 in words is "nine hundred ninety-nine million, eight hundred sixty-three thousand, four hundred ninety".