138040782 has 32 divisors (see below), whose sum is σ = 318898944. Its totient is φ = 39369600.

The previous prime is 138040781. The next prime is 138040787. The reversal of 138040782 is 287040831.

138040782 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138040781) 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, 60394 + ... + 62637.

It is an arithmetic number, because the mean of its divisors is an integer number (9965592).

Almost surely, 2^138040782 is an apocalyptic number.

138040782 is an abundant number, since it is smaller than the sum of its proper divisors (180858162).

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

138040782 is a wasteful number, since it uses less digits than its factorization.

138040782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123064.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 138040782 is about 11749.0757934401. The cubic root of 138040782 is about 516.8158253125.

The spelling of 138040782 in words is "one hundred thirty-eight million, forty thousand, seven hundred eighty-two".