135440244 has 36 divisors (see below), whose sum is σ = 342858880. Its totient is φ = 45081360.

The previous prime is 135440233. The next prime is 135440251. The reversal of 135440244 is 442044531.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26877 + ... + 31515.

Almost surely, 2^135440244 is an apocalyptic number.

It is an amenable number.

135440244 is an abundant number, since it is smaller than the sum of its proper divisors (207418636).

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

135440244 is a wasteful number, since it uses less digits than its factorization.

135440244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5460 (or 5455 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 135440244 is about 11637.8797037948. The cubic root of 135440244 is about 513.5498134937.

Adding to 135440244 its reverse (442044531), we get a palindrome (577484775).

The spelling of 135440244 in words is "one hundred thirty-five million, four hundred forty thousand, two hundred forty-four".