999999504 has 120 divisors (see below), whose sum is σ = 3223252032. Its totient is φ = 283495680.

The previous prime is 999999503. The next prime is 999999527. The reversal of 999999504 is 405999999.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (999999503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128262 + ... + 135834.

Almost surely, 2^999999504 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 999999504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1611626016).

999999504 is an abundant number, since it is smaller than the sum of its proper divisors (2223252528).

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

999999504 is a wasteful number, since it uses less digits than its factorization.

999999504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7725 (or 7716 counting only the distinct ones).

The product of its (nonzero) digits is 10628820, while the sum is 63.

The square root of 999999504 is about 31622.7687592342. The cubic root of 999999504 is about 999.9998346666. Note that the first 3 decimals are identical.

The spelling of 999999504 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred four".