138790 has 8 divisors (see below), whose sum is σ = 249840. Its totient is φ = 55512.

The previous prime is 138763. The next prime is 138793. The reversal of 138790 is 97831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6930 + ... + 6949.

It is an arithmetic number, because the mean of its divisors is an integer number (31230).

2¹³⁸⁷⁹⁰ is an apocalyptic number.

138790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138790 is a deficient number, since it is larger than the sum of its proper divisors (111050).

138790 is a wasteful number, since it uses less digits than its factorization.

138790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13886.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 138790 is about 372.5452992590. The cubic root of 138790 is about 51.7749146836.

The spelling of 138790 in words is "one hundred thirty-eight thousand, seven hundred ninety".