999000920 has 64 divisors (see below), whose sum is σ = 2394839520. Its totient is φ = 373745664.

The previous prime is 999000911. The next prime is 999000941. The reversal of 999000920 is 29000999.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106334 + ... + 115346.

Almost surely, 2^999000920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999000920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197419760).

999000920 is an abundant number, since it is smaller than the sum of its proper divisors (1395838600).

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

999000920 is a wasteful number, since it uses less digits than its factorization.

999000920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9204 (or 9200 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 999000920 is about 31606.9758123108. The cubic root of 999000920 is about 999.6668623650. Note that the first 3 decimals are identical.

The spelling of 999000920 in words is "nine hundred ninety-nine million, nine hundred twenty", and thus it is an aban number.