138331090 has 16 divisors (see below), whose sum is σ = 249137280. Its totient is φ = 55301040.

The previous prime is 138331087. The next prime is 138331093. The reversal of 138331090 is 90133831.

138331090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138331087) and next prime (138331093).

It is not an unprimeable number, because it can be changed into a prime (138331093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24121 + ... + 29299.

It is an arithmetic number, because the mean of its divisors is an integer number (15571080).

Almost surely, 2^138331090 is an apocalyptic number.

138331090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138331090 is a deficient number, since it is larger than the sum of its proper divisors (110806190).

138331090 is a wasteful number, since it uses less digits than its factorization.

138331090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 138331090 is about 11761.4238083661. The cubic root of 138331090 is about 517.1778698018.

The spelling of 138331090 in words is "one hundred thirty-eight million, three hundred thirty-one thousand, ninety".