138137632 has 24 divisors (see below), whose sum is σ = 283784256. Its totient is φ = 66065472.

The previous prime is 138137621. The next prime is 138137639. The reversal of 138137632 is 236731831.

It is not an unprimeable number, because it can be changed into a prime (138137639) 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, 93108 + ... + 94579.

It is an arithmetic number, because the mean of its divisors is an integer number (11824344).

Almost surely, 2^138137632 is an apocalyptic number.

It is an amenable number.

138137632 is an abundant number, since it is smaller than the sum of its proper divisors (145646624).

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

138137632 is a wasteful number, since it uses less digits than its factorization.

138137632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187720 (or 187712 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 138137632 is about 11753.1966715443. The cubic root of 138137632 is about 516.9366637840.

The spelling of 138137632 in words is "one hundred thirty-eight million, one hundred thirty-seven thousand, six hundred thirty-two".