135809536 has 80 divisors (see below), whose sum is σ = 285490656. Its totient is φ = 64475136.

The previous prime is 135809501. The next prime is 135809539. The reversal of 135809536 is 635908531.

It is not an unprimeable number, because it can be changed into a prime (135809539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1269195 + ... + 1269301.

Almost surely, 2^135809536 is an apocalyptic number.

135809536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135809536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142745328).

135809536 is an abundant number, since it is smaller than the sum of its proper divisors (149681120).

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

135809536 is an equidigital number, since it uses as much as digits as its factorization.

135809536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 135809536 is about 11653.7348519691. The cubic root of 135809536 is about 514.0161390260.

The spelling of 135809536 in words is "one hundred thirty-five million, eight hundred nine thousand, five hundred thirty-six".