138817190 has 16 divisors (see below), whose sum is σ = 260735328. Its totient is φ = 53112576.

The previous prime is 138817183. The next prime is 138817219. The reversal of 138817190 is 91718831.

It is a super-2 number, since 2×138817190² = 38540424478992200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301547 + ... + 302006.

It is an arithmetic number, because the mean of its divisors is an integer number (16295958).

Almost surely, 2^138817190 is an apocalyptic number.

138817190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138817190 is a deficient number, since it is larger than the sum of its proper divisors (121918138).

138817190 is a wasteful number, since it uses less digits than its factorization.

138817190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603583.

The product of its (nonzero) digits is 12096, while the sum is 38.

The square root of 138817190 is about 11782.0707008573. The cubic root of 138817190 is about 517.7829549395.

The spelling of 138817190 in words is "one hundred thirty-eight million, eight hundred seventeen thousand, one hundred ninety".