999478800 has 180 divisors, whose sum is σ = 3619571904. Its totient is φ = 254918400.

The previous prime is 999478789. The next prime is 999478813. The reversal of 999478800 is 8874999.

999478800 is a `hidden beast` number, since 9 + 99 + 478 + 80 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 76765 + ... + 88835.

Almost surely, 2^999478800 is an apocalyptic number.

999478800 is a gapful number since it is divisible by the number (90) 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 999478800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1809785952).

999478800 is an abundant number, since it is smaller than the sum of its proper divisors (2620093104).

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

999478800 is a wasteful number, since it uses less digits than its factorization.

999478800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12118 (or 12104 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 999478800 is about 31614.5346320328. The cubic root of 999478800 is about 999.8262364747.

The spelling of 999478800 in words is "nine hundred ninety-nine million, four hundred seventy-eight thousand, eight hundred".