135984786 has 128 divisors (see below), whose sum is σ = 353894400. Its totient is φ = 33929280.

The previous prime is 135984781. The next prime is 135984841. The reversal of 135984786 is 687489531.

135984786 is a nontrivial binomial coefficient, being equal to C(16492, 2).

Its product of digits (1451520) is a multiple of the sum of its prime divisors (324).

It is not an unprimeable number, because it can be changed into a prime (135984781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 568855 + ... + 569093.

It is an arithmetic number, because the mean of its divisors is an integer number (2764800).

Almost surely, 2^135984786 is an apocalyptic number.

135984786 is the 16491-st triangular number and also the 8246-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135984786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176947200).

135984786 is an abundant number, since it is smaller than the sum of its proper divisors (217909614).

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

135984786 is a wasteful number, since it uses less digits than its factorization.

135984786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324.

The product of its digits is 1451520, while the sum is 51.

The square root of 135984786 is about 11661.2514765783. The cubic root of 135984786 is about 514.2371412018.

The spelling of 135984786 in words is "one hundred thirty-five million, nine hundred eighty-four thousand, seven hundred eighty-six".