490256538 has 8 divisors (see below), whose sum is σ = 980513088. Its totient is φ = 163418844.

The previous prime is 490256531. The next prime is 490256561. The reversal of 490256538 is 835652094.

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

490256538 is an admirable number.

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 490256538.

It is not an unprimeable number, because it can be changed into a prime (490256531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40854706 + ... + 40854717.

It is an arithmetic number, because the mean of its divisors is an integer number (122564136).

Almost surely, 2^490256538 is an apocalyptic number.

490256538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

490256538 is a wasteful number, since it uses less digits than its factorization.

490256538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81709428.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 490256538 is about 22141.7374657004. The cubic root of 490256538 is about 788.5110758207.

The spelling of 490256538 in words is "four hundred ninety million, two hundred fifty-six thousand, five hundred thirty-eight".