490998138 has 8 divisors (see below), whose sum is σ = 981996288. Its totient is φ = 163666044.

The previous prime is 490998127. The next prime is 490998149. The reversal of 490998138 is 831899094.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (490998127) and next prime (490998149).

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

490998138 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40916506 + ... + 40916517.

It is an arithmetic number, because the mean of its divisors is an integer number (122749536).

Almost surely, 2^490998138 is an apocalyptic number.

490998138 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.

490998138 is a wasteful number, since it uses less digits than its factorization.

490998138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81833028.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 490998138 is about 22158.4777906787. The cubic root of 490998138 is about 788.9084631510.

The spelling of 490998138 in words is "four hundred ninety million, nine hundred ninety-eight thousand, one hundred thirty-eight".