499980390 has 128 divisors (see below), whose sum is σ = 1483840512. Its totient is φ = 104993280.

The previous prime is 499980379. The next prime is 499980391. The reversal of 499980390 is 93089994.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499980391) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1018045 + ... + 1018535.

It is an arithmetic number, because the mean of its divisors is an integer number (11592504).

Almost surely, 2^499980390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 499980390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741920256).

499980390 is an abundant number, since it is smaller than the sum of its proper divisors (983860122).

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

499980390 is a wasteful number, since it uses less digits than its factorization.

499980390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 499980390 is about 22360.2412777680. The cubic root of 499980390 is about 793.6901495369.

The spelling of 499980390 in words is "four hundred ninety-nine million, nine hundred eighty thousand, three hundred ninety".