135400144 has 20 divisors (see below), whose sum is σ = 286187040. Its totient is φ = 61545440.

The previous prime is 135400129. The next prime is 135400147. The reversal of 135400144 is 441004531.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135400147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384484 + ... + 384835.

It is an arithmetic number, because the mean of its divisors is an integer number (14309352).

Almost surely, 2^135400144 is an apocalyptic number.

It is an amenable number.

135400144 is an abundant number, since it is smaller than the sum of its proper divisors (150786896).

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

135400144 is a wasteful number, since it uses less digits than its factorization.

135400144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769338 (or 769332 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 135400144 is about 11636.1567538427. The cubic root of 135400144 is about 513.4991259983.

Adding to 135400144 its reverse (441004531), we get a palindrome (576404675).

The spelling of 135400144 in words is "one hundred thirty-five million, four hundred thousand, one hundred forty-four".