999000001038 has 16 divisors (see below), whose sum is σ = 2151692310096. Its totient is φ = 307384615680.

The previous prime is 999000000959. The next prime is 999000001039. The reversal of 999000001038 is 830100000999.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 999000000987 and 999000001005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999000001039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6403846083 + ... + 6403846238.

It is an arithmetic number, because the mean of its divisors is an integer number (134480769381).

Almost surely, 2^999000001038 is an apocalyptic number.

999000001038 is an abundant number, since it is smaller than the sum of its proper divisors (1152692309058).

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

999000001038 is a wasteful number, since it uses less digits than its factorization.

999000001038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12807692339.

The product of its (nonzero) digits is 17496, while the sum is 39.

Subtracting from 999000001038 its sum of digits (39), we obtain a palindrome (999000000999).

The spelling of 999000001038 in words is "nine hundred ninety-nine billion, one thousand, thirty-eight".