138568190 has 32 divisors (see below), whose sum is σ = 264933504. Its totient is φ = 52001280.

The previous prime is 138568189. The next prime is 138568201. The reversal of 138568190 is 91865831.

It is a super-2 number, since 2×138568190² = 38402286559752200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61280 + ... + 63500.

It is an arithmetic number, because the mean of its divisors is an integer number (8279172).

Almost surely, 2^138568190 is an apocalyptic number.

138568190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138568190 is a deficient number, since it is larger than the sum of its proper divisors (126365314).

138568190 is a wasteful number, since it uses less digits than its factorization.

138568190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 138568190 is about 11771.4990549207. The cubic root of 138568190 is about 517.4731827375.

The spelling of 138568190 in words is "one hundred thirty-eight million, five hundred sixty-eight thousand, one hundred ninety".