138632252 has 12 divisors (see below), whose sum is σ = 264661656. Its totient is φ = 63014640.

The previous prime is 138632251. The next prime is 138632261. The reversal of 138632252 is 252236831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138632251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1575323 + ... + 1575410.

It is an arithmetic number, because the mean of its divisors is an integer number (22055138).

Almost surely, 2^138632252 is an apocalyptic number.

It is an amenable number.

138632252 is a deficient number, since it is larger than the sum of its proper divisors (126029404).

138632252 is a wasteful number, since it uses less digits than its factorization.

138632252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150748 (or 3150746 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 138632252 is about 11774.2198043013. The cubic root of 138632252 is about 517.5529154663.

The spelling of 138632252 in words is "one hundred thirty-eight million, six hundred thirty-two thousand, two hundred fifty-two".