138526772 has 6 divisors (see below), whose sum is σ = 242421858. Its totient is φ = 69263384.

The previous prime is 138526763. The next prime is 138526807. The reversal of 138526772 is 277625831.

It can be written as a sum of positive squares in only one way, i.e., 133310116 + 5216656 = 11546^2 + 2284^2 .

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, 17315843 + ... + 17315850.

It is an arithmetic number, because the mean of its divisors is an integer number (40403643).

Almost surely, 2^138526772 is an apocalyptic number.

It is an amenable number.

138526772 is a deficient number, since it is larger than the sum of its proper divisors (103895086).

138526772 is a wasteful number, since it uses less digits than its factorization.

138526772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34631697 (or 34631695 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 138526772 is about 11769.7396742664. The cubic root of 138526772 is about 517.4216200616.

The spelling of 138526772 in words is "one hundred thirty-eight million, five hundred twenty-six thousand, seven hundred seventy-two".