135870812 has 48 divisors (see below), whose sum is σ = 300556032. Its totient is φ = 52202880.

The previous prime is 135870811. The next prime is 135870827. The reversal of 135870812 is 218078531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135870811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19463 + ... + 25505.

It is an arithmetic number, because the mean of its divisors is an integer number (6261584).

Almost surely, 2^135870812 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 135870812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150278016).

135870812 is an abundant number, since it is smaller than the sum of its proper divisors (164685220).

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

135870812 is a wasteful number, since it uses less digits than its factorization.

135870812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6138 (or 6136 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 135870812 is about 11656.3635838970. The cubic root of 135870812 is about 514.0934338366.

The spelling of 135870812 in words is "one hundred thirty-five million, eight hundred seventy thousand, eight hundred twelve".