999999600 has 120 divisors (see below), whose sum is σ = 3220841472. Its totient is φ = 265209600.

The previous prime is 999999599. The next prime is 999999607. The reversal of 999999600 is 6999999.

999999600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227019 + ... + 231381.

Almost surely, 2^999999600 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 999999600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1610420736).

999999600 is an abundant number, since it is smaller than the sum of its proper divisors (2220841872).

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

999999600 is a wasteful number, since it uses less digits than its factorization.

999999600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4575 (or 4564 counting only the distinct ones).

The product of its (nonzero) digits is 3188646, while the sum is 60.

The square root of 999999600 is about 31622.7702771278. The cubic root of 999999600 is about 999.9998666666. Note that the first 3 decimals are identical.

The spelling of 999999600 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred".