138761432 has 8 divisors (see below), whose sum is σ = 260177700. Its totient is φ = 69380712.

The previous prime is 138761431. The next prime is 138761459. The reversal of 138761432 is 234167831.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 138761392 and 138761401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138761431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8672582 + ... + 8672597.

Almost surely, 2^138761432 is an apocalyptic number.

It is an amenable number.

138761432 is a deficient number, since it is larger than the sum of its proper divisors (121416268).

138761432 is a wasteful number, since it uses less digits than its factorization.

138761432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17345185 (or 17345181 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 138761432 is about 11779.7042407694. The cubic root of 138761432 is about 517.7136205669.

The spelling of 138761432 in words is "one hundred thirty-eight million, seven hundred sixty-one thousand, four hundred thirty-two".