138565782 has 32 divisors (see below), whose sum is σ = 312528000. Its totient is φ = 45498024.

The previous prime is 138565781. The next prime is 138565787. The reversal of 138565782 is 287565831.

138565782 is a `hidden beast` number, since 1 + 3 + 8 + 565 + 7 + 82 = 666.

138565782 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138565781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15532 + ... + 22767.

It is an arithmetic number, because the mean of its divisors is an integer number (9766500).

Almost surely, 2^138565782 is an apocalyptic number.

138565782 is an abundant number, since it is smaller than the sum of its proper divisors (173962218).

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

138565782 is a wasteful number, since it uses less digits than its factorization.

138565782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38377 (or 38371 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 138565782 is about 11771.3967735354. The cubic root of 138565782 is about 517.4701852178.

The spelling of 138565782 in words is "one hundred thirty-eight million, five hundred sixty-five thousand, seven hundred eighty-two".