138032668 has 6 divisors (see below), whose sum is σ = 241557176. Its totient is φ = 69016332.

The previous prime is 138032651. The next prime is 138032689. The reversal of 138032668 is 866230831.

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, 17254080 + ... + 17254087.

Almost surely, 2^138032668 is an apocalyptic number.

It is an amenable number.

138032668 is a deficient number, since it is larger than the sum of its proper divisors (103524508).

138032668 is a wasteful number, since it uses less digits than its factorization.

138032668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34508171 (or 34508169 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 138032668 is about 11748.7304846098. The cubic root of 138032668 is about 516.8056990157.

It can be divided in two parts, 13803 and 2668, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 138032668 in words is "one hundred thirty-eight million, thirty-two thousand, six hundred sixty-eight".