138556632 has 32 divisors (see below), whose sum is σ = 346837680. Its totient is φ = 46126080.

The previous prime is 138556597. The next prime is 138556633. The reversal of 138556632 is 236655831.

138556632 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138556633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17868 + ... + 24420.

Almost surely, 2^138556632 is an apocalyptic number.

138556632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138556632 is an abundant number, since it is smaller than the sum of its proper divisors (208281048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138556632 is a wasteful number, since it uses less digits than its factorization.

138556632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7443 (or 7439 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 138556632 is about 11771.0081131567. The cubic root of 138556632 is about 517.4587948242.

The spelling of 138556632 in words is "one hundred thirty-eight million, five hundred fifty-six thousand, six hundred thirty-two".