138562228 has 24 divisors (see below), whose sum is σ = 277385472. Its totient is φ = 59327904.

The previous prime is 138562213. The next prime is 138562243. The reversal of 138562228 is 822265831.

138562228 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138562213) and next prime (138562243).

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, 44325 + ... + 47347.

It is an arithmetic number, because the mean of its divisors is an integer number (11557728).

Almost surely, 2^138562228 is an apocalyptic number.

It is an amenable number.

138562228 is an abundant number, since it is smaller than the sum of its proper divisors (138823244).

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

138562228 is a wasteful number, since it uses less digits than its factorization.

138562228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671 (or 4669 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 138562228 is about 11771.2458134218. The cubic root of 138562228 is about 517.4657610742.

The spelling of 138562228 in words is "one hundred thirty-eight million, five hundred sixty-two thousand, two hundred twenty-eight".