138228283 has 8 divisors (see below), whose sum is σ = 140313600. Its totient is φ = 136153128.

The previous prime is 138228281. The next prime is 138228313. The reversal of 138228283 is 382822831.

138228283 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138228283 - 2¹ = 138228281 is a prime.

It is a super-2 number, since 2×138228283² = 38214116442256178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138228281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27478 + ... + 32116.

It is an arithmetic number, because the mean of its divisors is an integer number (17539200).

Almost surely, 2^138228283 is an apocalyptic number.

138228283 is a deficient number, since it is larger than the sum of its proper divisors (2085317).

138228283 is an equidigital number, since it uses as much as digits as its factorization.

138228283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5081.

The product of its digits is 36864, while the sum is 37.

The square root of 138228283 is about 11757.0524792569. The cubic root of 138228283 is about 517.0497166814.

It can be divided in two parts, 13822828 and 3, that added together give a palindrome (13822831).

The spelling of 138228283 in words is "one hundred thirty-eight million, two hundred twenty-eight thousand, two hundred eighty-three".