138865486 has 8 divisors (see below), whose sum is σ = 220551120. Its totient is φ = 65348448.

The previous prime is 138865457. The next prime is 138865501. The reversal of 138865486 is 684568831.

138865486 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2042106 + ... + 2042173.

It is an arithmetic number, because the mean of its divisors is an integer number (27568890).

Almost surely, 2^138865486 is an apocalyptic number.

138865486 is a deficient number, since it is larger than the sum of its proper divisors (81685634).

138865486 is a wasteful number, since it uses less digits than its factorization.

138865486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4084298.

The product of its digits is 1105920, while the sum is 49.

The square root of 138865486 is about 11784.1200774602. The cubic root of 138865486 is about 517.8429954049.

The spelling of 138865486 in words is "one hundred thirty-eight million, eight hundred sixty-five thousand, four hundred eighty-six".