138127266 has 48 divisors (see below), whose sum is σ = 312833664. Its totient is φ = 44003232.

The previous prime is 138127243. The next prime is 138127277. The reversal of 138127266 is 662721831.

138127266 is a `hidden beast` number, since 1 + 381 + 272 + 6 + 6 = 666.

138127266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138127266² = 38158283225269512, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138127266.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34480 + ... + 38276.

It is an arithmetic number, because the mean of its divisors is an integer number (6517368).

Almost surely, 2^138127266 is an apocalyptic number.

138127266 is an abundant number, since it is smaller than the sum of its proper divisors (174706398).

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

138127266 is a wasteful number, since it uses less digits than its factorization.

138127266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895 (or 3892 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 138127266 is about 11752.7556768615. The cubic root of 138127266 is about 516.9237329617.

The spelling of 138127266 in words is "one hundred thirty-eight million, one hundred twenty-seven thousand, two hundred sixty-six".