138875226 has 32 divisors (see below), whose sum is σ = 327671808. Its totient is φ = 38398320.

The previous prime is 138875221. The next prime is 138875239. The reversal of 138875226 is 622578831.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (138875221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52030 + ... + 54633.

It is an arithmetic number, because the mean of its divisors is an integer number (10239744).

Almost surely, 2^138875226 is an apocalyptic number.

138875226 is an abundant number, since it is smaller than the sum of its proper divisors (188796582).

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

138875226 is a wasteful number, since it uses less digits than its factorization.

138875226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106706.

The product of its digits is 161280, while the sum is 42.

The square root of 138875226 is about 11784.5333382362. The cubic root of 138875226 is about 517.8551022598.

The spelling of 138875226 in words is "one hundred thirty-eight million, eight hundred seventy-five thousand, two hundred twenty-six".