138222680 has 16 divisors (see below), whose sum is σ = 311001120. Its totient is φ = 55289056.

The previous prime is 138222677. The next prime is 138222703. The reversal of 138222680 is 86222831.

It is a congruent number.

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, 1727744 + ... + 1727823.

It is an arithmetic number, because the mean of its divisors is an integer number (19437570).

Almost surely, 2^138222680 is an apocalyptic number.

138222680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138222680 is an abundant number, since it is smaller than the sum of its proper divisors (172778440).

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

138222680 is a wasteful number, since it uses less digits than its factorization.

138222680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455578 (or 3455574 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 138222680 is about 11756.8141943300. The cubic root of 138222680 is about 517.0427304877.

The spelling of 138222680 in words is "one hundred thirty-eight million, two hundred twenty-two thousand, six hundred eighty".