135143808 has 64 divisors (see below), whose sum is σ = 377889600. Its totient is φ = 42674688.

The previous prime is 135143803. The next prime is 135143809. The reversal of 135143808 is 808341531.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135143803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1966 + ... + 16557.

It is an arithmetic number, because the mean of its divisors is an integer number (5904525).

Almost surely, 2^135143808 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 135143808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188944800).

135143808 is an abundant number, since it is smaller than the sum of its proper divisors (242745792).

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

135143808 is a wasteful number, since it uses less digits than its factorization.

135143808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18559 (or 18547 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 135143808 is about 11625.1369024197. The cubic root of 135143808 is about 513.1748735994.

The spelling of 135143808 in words is "one hundred thirty-five million, one hundred forty-three thousand, eight hundred eight".