999120600 has 288 divisors, whose sum is σ = 3598564320. Its totient is φ = 247541760.

The previous prime is 999120593. The next prime is 999120611. The reversal of 999120600 is 6021999.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3151642 + ... + 3151958.

It is an arithmetic number, because the mean of its divisors is an integer number (12495015).

Almost surely, 2^999120600 is an apocalyptic number.

999120600 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 999120600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1799282160).

999120600 is an abundant number, since it is smaller than the sum of its proper divisors (2599443720).

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

999120600 is a wasteful number, since it uses less digits than its factorization.

999120600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 999120600 is about 31608.8690085552. The cubic root of 999120600 is about 999.7067806975.

The spelling of 999120600 in words is "nine hundred ninety-nine million, one hundred twenty thousand, six hundred".