139489638 has 8 divisors (see below), whose sum is σ = 278979288. Its totient is φ = 46496544.

The previous prime is 139489627. The next prime is 139489643. The reversal of 139489638 is 836984931.

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

139489638 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11624131 + ... + 11624142.

It is an arithmetic number, because the mean of its divisors is an integer number (34872411).

Almost surely, 2^139489638 is an apocalyptic number.

139489638 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.

139489638 is a wasteful number, since it uses less digits than its factorization.

139489638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23248278.

The product of its digits is 1119744, while the sum is 51.

The square root of 139489638 is about 11810.5731444329. The cubic root of 139489638 is about 518.6176772288.

The spelling of 139489638 in words is "one hundred thirty-nine million, four hundred eighty-nine thousand, six hundred thirty-eight".