999989000030 has 32 divisors (see below), whose sum is σ = 1878336000000. Its totient is φ = 382584974112.

The previous prime is 999988999991. The next prime is 999989000039. The reversal of 999989000030 is 30000989999.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 999989000030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999989000039) 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, 4899971 + ... + 5099969.

It is an arithmetic number, because the mean of its divisors is an integer number (58698000000).

Almost surely, 2^999989000030 is an apocalyptic number.

It is a pronic number, being equal to 999994×999995.

999989000030 is a deficient number, since it is larger than the sum of its proper divisors (878346999970).

999989000030 is a wasteful number, since it uses less digits than its factorization.

999989000030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221768.

The product of its (nonzero) digits is 1417176, while the sum is 56.

The spelling of 999989000030 in words is "nine hundred ninety-nine billion, nine hundred eighty-nine million, thirty", and thus it is an aban number.