138228352 has 32 divisors (see below), whose sum is σ = 275914080. Its totient is φ = 68979456.

The previous prime is 138228313. The next prime is 138228397. The reversal of 138228352 is 253822831.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112413 + ... + 113635.

It is an arithmetic number, because the mean of its divisors is an integer number (8622315).

Almost surely, 2^138228352 is an apocalyptic number.

It is an amenable number.

138228352 is a deficient number, since it is larger than the sum of its proper divisors (137685728).

138228352 is an equidigital number, since it uses as much as digits as its factorization.

138228352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120 (or 2108 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 138228352 is about 11757.0554136654. The cubic root of 138228352 is about 517.0498027141.

The spelling of 138228352 in words is "one hundred thirty-eight million, two hundred twenty-eight thousand, three hundred fifty-two".