135538508 has 48 divisors (see below), whose sum is σ = 278476800. Its totient is φ = 57696912.

The previous prime is 135538499. The next prime is 135538567. The reversal of 135538508 is 805835531.

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, 305735 + ... + 306177.

It is an arithmetic number, because the mean of its divisors is an integer number (5801600).

Almost surely, 2^135538508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135538508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139238400).

135538508 is an abundant number, since it is smaller than the sum of its proper divisors (142938292).

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

135538508 is a wasteful number, since it uses less digits than its factorization.

135538508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 135538508 is about 11642.1006695527. The cubic root of 135538508 is about 513.6739795916.

The spelling of 135538508 in words is "one hundred thirty-five million, five hundred thirty-eight thousand, five hundred eight".