490839905 has 8 divisors (see below), whose sum is σ = 603374184. Its totient is φ = 383094400.

The previous prime is 490839893. The next prime is 490839907. The reversal of 490839905 is 509938094.

It can be written as a sum of positive squares in 4 ways, for example, as 71081761 + 419758144 = 8431^2 + 20488^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-490839905 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 490839905.

It is not an unprimeable number, because it can be changed into a prime (490839907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1196966 + ... + 1197375.

It is an arithmetic number, because the mean of its divisors is an integer number (75421773).

Almost surely, 2^490839905 is an apocalyptic number.

It is an amenable number.

490839905 is a deficient number, since it is larger than the sum of its proper divisors (112534279).

490839905 is a wasteful number, since it uses less digits than its factorization.

490839905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394387.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 490839905 is about 22154.9070185365. The cubic root of 490839905 is about 788.8237073883.

The spelling of 490839905 in words is "four hundred ninety million, eight hundred thirty-nine thousand, nine hundred five".