490907138 has 8 divisors (see below), whose sum is σ = 748432380. Its totient is φ = 241429680.

The previous prime is 490907117. The next prime is 490907141. The reversal of 490907138 is 831709094.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 350176369 + 140730769 = 18713^2 + 11863^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 490907095 and 490907104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011793 + ... + 2012036.

Almost surely, 2^490907138 is an apocalyptic number.

490907138 is a deficient number, since it is larger than the sum of its proper divisors (257525242).

490907138 is a wasteful number, since it uses less digits than its factorization.

490907138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023892.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 490907138 is about 22156.4243053792. The cubic root of 490907138 is about 788.8597222291.

The spelling of 490907138 in words is "four hundred ninety million, nine hundred seven thousand, one hundred thirty-eight".