138246772 has 12 divisors (see below), whose sum is σ = 242213860. Its totient is φ = 69042816.

The previous prime is 138246751. The next prime is 138246803. The reversal of 138246772 is 277642831.

It can be written as a sum of positive squares in 2 ways, for example, as 97337956 + 40908816 = 9866^2 + 6396^2 .

It is a super-2 number, since 2×138246772² = 38224339936839968, which contains 22 as substring.

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, 16197 + ... + 23212.

Almost surely, 2^138246772 is an apocalyptic number.

It is an amenable number.

138246772 is a deficient number, since it is larger than the sum of its proper divisors (103967088).

138246772 is a wasteful number, since it uses less digits than its factorization.

138246772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40290 (or 40288 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

The square root of 138246772 is about 11757.8387469807. The cubic root of 138246772 is about 517.0727686594.

The spelling of 138246772 in words is "one hundred thirty-eight million, two hundred forty-six thousand, seven hundred seventy-two".