138181746 has 32 divisors (see below), whose sum is σ = 305347968. Its totient is φ = 41465600.

The previous prime is 138181721. The next prime is 138181751. The reversal of 138181746 is 647181831.

138181746 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27105 + ... + 31796.

It is an arithmetic number, because the mean of its divisors is an integer number (9542124).

Almost surely, 2^138181746 is an apocalyptic number.

138181746 is an abundant number, since it is smaller than the sum of its proper divisors (167166222).

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

138181746 is a wasteful number, since it uses less digits than its factorization.

138181746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58946.

The product of its digits is 32256, while the sum is 39.

The square root of 138181746 is about 11755.0732026645. The cubic root of 138181746 is about 516.9916855199.

The spelling of 138181746 in words is "one hundred thirty-eight million, one hundred eighty-one thousand, seven hundred forty-six".