499990000 has 50 divisors (see below), whose sum is σ = 1210550000. Its totient is φ = 199992000.

The previous prime is 499989989. The next prime is 499990019. The reversal of 499990000 is 99994.

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15000 + ... + 34999.

It is an arithmetic number, because the mean of its divisors is an integer number (24211000).

Almost surely, 2^499990000 is an apocalyptic number.

499990000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

499990000 is an abundant number, since it is smaller than the sum of its proper divisors (710560000).

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

499990000 is an equidigital number, since it uses as much as digits as its factorization.

499990000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50027 (or 50006 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 499990000 is about 22360.4561670821. The cubic root of 499990000 is about 793.6952346120.

The spelling of 499990000 in words is "four hundred ninety-nine million, nine hundred ninety thousand".