138022272 has 64 divisors (see below), whose sum is σ = 407367600. Its totient is φ = 46006272.

The previous prime is 138022267. The next prime is 138022301. The reversal of 138022272 is 272220831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 16513 + ... + 23424.

Almost surely, 2^138022272 is an apocalyptic number.

138022272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138022272 is an abundant number, since it is smaller than the sum of its proper divisors (269345328).

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

138022272 is an equidigital number, since it uses as much as digits as its factorization.

138022272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39960 (or 39942 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 138022272 is about 11748.2880454984. The cubic root of 138022272 is about 516.7927241960.

The spelling of 138022272 in words is "one hundred thirty-eight million, twenty-two thousand, two hundred seventy-two".