138269090 has 16 divisors (see below), whose sum is σ = 249607872. Its totient is φ = 55146864.

The previous prime is 138269069. The next prime is 138269107. The reversal of 138269090 is 90962831.

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 7 ways as a sum of consecutive naturals, for example, 16454 + ... + 23393.

It is an arithmetic number, because the mean of its divisors is an integer number (15600492).

Almost surely, 2^138269090 is an apocalyptic number.

138269090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138269090 is a deficient number, since it is larger than the sum of its proper divisors (111338782).

138269090 is a wasteful number, since it uses less digits than its factorization.

138269090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40201.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 138269090 is about 11758.7877776580. The cubic root of 138269090 is about 517.1005918748.

The spelling of 138269090 in words is "one hundred thirty-eight million, two hundred sixty-nine thousand, ninety".