999788000 has 48 divisors (see below), whose sum is σ = 2456488944. Its totient is φ = 399913600.

The previous prime is 999787979. The next prime is 999788029. The reversal of 999788000 is 887999.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a self number, because there is not a number n which added to its sum of digits gives 999788000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120974 + ... + 128973.

It is an arithmetic number, because the mean of its divisors is an integer number (51176853).

Almost surely, 2^999788000 is an apocalyptic number.

It is an amenable number.

999788000 is an abundant number, since it is smaller than the sum of its proper divisors (1456700944).

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

999788000 is a wasteful number, since it uses less digits than its factorization.

999788000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249972 (or 249954 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 999788000 is about 31619.4244096884. The cubic root of 999788000 is about 999.9293283390.

The spelling of 999788000 in words is "nine hundred ninety-nine million, seven hundred eighty-eight thousand".