490389398340 has 24 divisors (see below), whose sum is σ = 1373090315520. Its totient is φ = 130770506208.

The previous prime is 490389398333. The next prime is 490389398341. The reversal of 490389398340 is 43893983094.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 8173156639 = 490389398340 / (4 + 9 + 0 + 3 + 8 + 9 + 3 + 9 + 8 + 3 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (490389398341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4086578260 + ... + 4086578379.

It is an arithmetic number, because the mean of its divisors is an integer number (57212096480).

Almost surely, 2^490389398340 is an apocalyptic number.

It is an amenable number.

490389398340 is an abundant number, since it is smaller than the sum of its proper divisors (882700917180).

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

490389398340 is a wasteful number, since it uses less digits than its factorization.

490389398340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8173156651 (or 8173156649 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 60.

The spelling of 490389398340 in words is "four hundred ninety billion, three hundred eighty-nine million, three hundred ninety-eight thousand, three hundred forty".