789999000 has 128 divisors (see below), whose sum is σ = 2816985600. Its totient is φ = 180566400.

The previous prime is 789998971. The next prime is 789999059. The reversal of 789999000 is 999987.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2191 + ... + 39809.

It is an arithmetic number, because the mean of its divisors is an integer number (22007700).

Almost surely, 2^789999000 is an apocalyptic number.

789999000 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 789999000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1408492800).

789999000 is an abundant number, since it is smaller than the sum of its proper divisors (2026986600).

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

789999000 is a wasteful number, since it uses less digits than its factorization.

789999000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37650 (or 37636 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 51.

The square root of 789999000 is about 28106.9208559031. The cubic root of 789999000 is about 924.4331564811.

The spelling of 789999000 in words is "seven hundred eighty-nine million, nine hundred ninety-nine thousand".