138705532 has 24 divisors (see below), whose sum is σ = 286361600. Its totient is φ = 57527280.

The previous prime is 138705527. The next prime is 138705547. The reversal of 138705532 is 235507831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79032 + ... + 80767.

Almost surely, 2^138705532 is an apocalyptic number.

It is an amenable number.

138705532 is an abundant number, since it is smaller than the sum of its proper divisors (147656068).

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

138705532 is a wasteful number, since it uses less digits than its factorization.

138705532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159841 (or 159839 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 138705532 is about 11777.3312766518. The cubic root of 138705532 is about 517.6440909721.

The spelling of 138705532 in words is "one hundred thirty-eight million, seven hundred five thousand, five hundred thirty-two".