138682190 has 8 divisors (see below), whose sum is σ = 249627960. Its totient is φ = 55472872.

The previous prime is 138682183. The next prime is 138682231. The reversal of 138682190 is 91286831.

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

It is a super-2 number, since 2×138682190² = 38465499646392200, which contains 22 as substring.

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, 6934100 + ... + 6934119.

It is an arithmetic number, because the mean of its divisors is an integer number (31203495).

Almost surely, 2^138682190 is an apocalyptic number.

138682190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138682190 is a deficient number, since it is larger than the sum of its proper divisors (110945770).

138682190 is a wasteful number, since it uses less digits than its factorization.

138682190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13868226.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 138682190 is about 11776.3402634265. The cubic root of 138682190 is about 517.6150521730.

The spelling of 138682190 in words is "one hundred thirty-eight million, six hundred eighty-two thousand, one hundred ninety".