138873486 has 8 divisors (see below), whose sum is σ = 277746984. Its totient is φ = 46291160.

The previous prime is 138873479. The next prime is 138873487. The reversal of 138873486 is 684378831.

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

138873486 is an admirable number.

It is a super-2 number, since 2×138873486² = 38571690227584392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138873487) by changing a digit.

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, 11572785 + ... + 11572796.

It is an arithmetic number, because the mean of its divisors is an integer number (34718373).

Almost surely, 2^138873486 is an apocalyptic number.

138873486 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.

138873486 is a wasteful number, since it uses less digits than its factorization.

138873486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23145586.

The product of its digits is 774144, while the sum is 48.

The square root of 138873486 is about 11784.4595124257. The cubic root of 138873486 is about 517.8529394751.

The spelling of 138873486 in words is "one hundred thirty-eight million, eight hundred seventy-three thousand, four hundred eighty-six".