138163782 has 32 divisors (see below), whose sum is σ = 295228800. Its totient is φ = 42977088.

The previous prime is 138163771. The next prime is 138163787. The reversal of 138163782 is 287361831.

It is a self number, because there is not a number n which added to its sum of digits gives 138163782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138163787) 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, 1407 + ... + 16682.

It is an arithmetic number, because the mean of its divisors is an integer number (9225900).

Almost surely, 2^138163782 is an apocalyptic number.

138163782 is an abundant number, since it is smaller than the sum of its proper divisors (157065018).

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

138163782 is a wasteful number, since it uses less digits than its factorization.

138163782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18180.

The product of its digits is 48384, while the sum is 39.

The square root of 138163782 is about 11754.3090822047. The cubic root of 138163782 is about 516.9692811107.

The spelling of 138163782 in words is "one hundred thirty-eight million, one hundred sixty-three thousand, seven hundred eighty-two".