138922772 has 6 divisors (see below), whose sum is σ = 243114858. Its totient is φ = 69461384.

The previous prime is 138922733. The next prime is 138922807. The reversal of 138922772 is 277229831.

It can be written as a sum of positive squares in only one way, i.e., 122633476 + 16289296 = 11074^2 + 4036^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17365343 + ... + 17365350.

It is an arithmetic number, because the mean of its divisors is an integer number (40519143).

Almost surely, 2^138922772 is an apocalyptic number.

It is an amenable number.

138922772 is a deficient number, since it is larger than the sum of its proper divisors (104192086).

138922772 is a wasteful number, since it uses less digits than its factorization.

138922772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34730697 (or 34730695 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 138922772 is about 11786.5504707696. The cubic root of 138922772 is about 517.9141939832.

The spelling of 138922772 in words is "one hundred thirty-eight million, nine hundred twenty-two thousand, seven hundred seventy-two".