490612905 has 24 divisors (see below), whose sum is σ = 859170312. Its totient is φ = 258960384.

The previous prime is 490612897. The next prime is 490612909. The reversal of 490612905 is 509216094.

It can be written as a sum of positive squares in 4 ways, for example, as 157477401 + 333135504 = 12549^2 + 18252^2 .

It is not a de Polignac number, because 490612905 - 2³ = 490612897 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 490612905.

It is not an unprimeable number, because it can be changed into a prime (490612909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51834 + ... + 60563.

It is an arithmetic number, because the mean of its divisors is an integer number (35798763).

Almost surely, 2^490612905 is an apocalyptic number.

490612905 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

490612905 is a deficient number, since it is larger than the sum of its proper divisors (368557407).

490612905 is a wasteful number, since it uses less digits than its factorization.

490612905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112505 (or 112502 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 490612905 is about 22149.7834075189. The cubic root of 490612905 is about 788.7020855243.

Adding to 490612905 its reverse (509216094), we get a palindrome (999828999).

The spelling of 490612905 in words is "four hundred ninety million, six hundred twelve thousand, nine hundred five".