490125638 has 16 divisors (see below), whose sum is σ = 754997760. Its totient is φ = 238547400.

The previous prime is 490125637. The next prime is 490125661. The reversal of 490125638 is 836521094.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490125631) 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, 10628 + ... + 33063.

It is an arithmetic number, because the mean of its divisors is an integer number (47187360).

Almost surely, 2^490125638 is an apocalyptic number.

490125638 is a deficient number, since it is larger than the sum of its proper divisors (264872122).

490125638 is a wasteful number, since it uses less digits than its factorization.

490125638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43843.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 490125638 is about 22138.7813124390. The cubic root of 490125638 is about 788.4408912816.

The spelling of 490125638 in words is "four hundred ninety million, one hundred twenty-five thousand, six hundred thirty-eight".