489670138 has 16 divisors (see below), whose sum is σ = 770466816. Its totient is φ = 232959760.

The previous prime is 489670121. The next prime is 489670177. The reversal of 489670138 is 831076984.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

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, 19081 + ... + 36652.

It is an arithmetic number, because the mean of its divisors is an integer number (48154176).

Almost surely, 2^489670138 is an apocalyptic number.

489670138 is a deficient number, since it is larger than the sum of its proper divisors (280796678).

489670138 is a wasteful number, since it uses less digits than its factorization.

489670138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55949.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 489670138 is about 22128.4915437090. The cubic root of 489670138 is about 788.1965687991.

The spelling of 489670138 in words is "four hundred eighty-nine million, six hundred seventy thousand, one hundred thirty-eight".