138673266 has 32 divisors (see below), whose sum is σ = 280713600. Its totient is φ = 45667200.

The previous prime is 138673259. The next prime is 138673277. The reversal of 138673266 is 662376831.

138673266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243430 + ... + 243998.

It is an arithmetic number, because the mean of its divisors is an integer number (8772300).

Almost surely, 2^138673266 is an apocalyptic number.

138673266 is an abundant number, since it is smaller than the sum of its proper divisors (142040334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138673266 is a wasteful number, since it uses less digits than its factorization.

138673266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994.

The product of its digits is 217728, while the sum is 42.

The square root of 138673266 is about 11775.9613620290. The cubic root of 138673266 is about 517.6039493395.

The spelling of 138673266 in words is "one hundred thirty-eight million, six hundred seventy-three thousand, two hundred sixty-six".