138227272 has 32 divisors (see below), whose sum is σ = 275474520. Its totient is φ = 64798720.

The previous prime is 138227269. The next prime is 138227291. The reversal of 138227272 is 272722831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 104980516 + 33246756 = 10246^2 + 5766^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36408 + ... + 40024.

Almost surely, 2^138227272 is an apocalyptic number.

It is an amenable number.

138227272 is a deficient number, since it is larger than the sum of its proper divisors (137247248).

138227272 is a wasteful number, since it uses less digits than its factorization.

138227272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921 (or 3917 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 138227272 is about 11757.0094837080. The cubic root of 138227272 is about 517.0484561132.

The spelling of 138227272 in words is "one hundred thirty-eight million, two hundred twenty-seven thousand, two hundred seventy-two".