999504900 has 144 divisors (see below), whose sum is σ = 3288331200. Its totient is φ = 260305920.

The previous prime is 999504889. The next prime is 999504901. The reversal of 999504900 is 9405999.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (999504901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 111796 + ... + 120404.

Almost surely, 2^999504900 is an apocalyptic number.

999504900 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 999504900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1644165600).

999504900 is an abundant number, since it is smaller than the sum of its proper divisors (2288826300).

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

999504900 is a wasteful number, since it uses less digits than its factorization.

999504900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8675 (or 8662 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 999504900 is about 31614.9474141584. The cubic root of 999504900 is about 999.8349394232.

The spelling of 999504900 in words is "nine hundred ninety-nine million, five hundred four thousand, nine hundred".