138282220 has 12 divisors (see below), whose sum is σ = 290392704. Its totient is φ = 55312880.

The previous prime is 138282197. The next prime is 138282223. The reversal of 138282220 is 22282831.

It is not an unprimeable number, because it can be changed into a prime (138282223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3457036 + ... + 3457075.

It is an arithmetic number, because the mean of its divisors is an integer number (24199392).

Almost surely, 2^138282220 is an apocalyptic number.

138282220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138282220 is an abundant number, since it is smaller than the sum of its proper divisors (152110484).

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

138282220 is a wasteful number, since it uses less digits than its factorization.

138282220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6914120 (or 6914118 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 138282220 is about 11759.3460702541. The cubic root of 138282220 is about 517.1169592732.

The spelling of 138282220 in words is "one hundred thirty-eight million, two hundred eighty-two thousand, two hundred twenty".