138741432 has 16 divisors (see below), whose sum is σ = 346853640. Its totient is φ = 46247136.

The previous prime is 138741397. The next prime is 138741433. The reversal of 138741432 is 234147831.

It is a junction number, because it is equal to n+sod(n) for n = 138741393 and 138741402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138741433) 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, 2890423 + ... + 2890470.

Almost surely, 2^138741432 is an apocalyptic number.

138741432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138741432 is an abundant number, since it is smaller than the sum of its proper divisors (208112208).

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

138741432 is a wasteful number, since it uses less digits than its factorization.

138741432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5780902 (or 5780898 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 138741432 is about 11778.8552924297. The cubic root of 138741432 is about 517.6887462923.

The spelling of 138741432 in words is "one hundred thirty-eight million, seven hundred forty-one thousand, four hundred thirty-two".