999981010 has 32 divisors (see below), whose sum is σ = 2085293952. Its totient is φ = 338152320.

The previous prime is 999980923. The next prime is 999981011. The reversal of 999981010 is 10189999.

It is not an unprimeable number, because it can be changed into a prime (999981011) 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, 92736 + ... + 102955.

It is an arithmetic number, because the mean of its divisors is an integer number (65165436).

Almost surely, 2^999981010 is an apocalyptic number.

999981010 is an abundant number, since it is smaller than the sum of its proper divisors (1085312942).

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

999981010 is a wasteful number, since it uses less digits than its factorization.

999981010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195778.

The product of its (nonzero) digits is 52488, while the sum is 46.

The square root of 999981010 is about 31622.4763419945. The cubic root of 999981010 is about 999.9936699599.

The spelling of 999981010 in words is "nine hundred ninety-nine million, nine hundred eighty-one thousand, ten".