138735936 has 56 divisors (see below), whose sum is σ = 407863040. Its totient is φ = 46244736.

The previous prime is 138735901. The next prime is 138735937. The reversal of 138735936 is 639537831.

It is a junction number, because it is equal to n+sod(n) for n = 138735891 and 138735900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138735937) 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, 38416 + ... + 41871.

Almost surely, 2^138735936 is an apocalyptic number.

138735936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138735936 is an abundant number, since it is smaller than the sum of its proper divisors (269127104).

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

138735936 is an equidigital number, since it uses as much as digits as its factorization.

138735936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80308 (or 80292 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 138735936 is about 11778.6219907084. The cubic root of 138735936 is about 517.6819104229.

The spelling of 138735936 in words is "one hundred thirty-eight million, seven hundred thirty-five thousand, nine hundred thirty-six".