135423404240 has 120 divisors (see below), whose sum is σ = 330033439008. Its totient is φ = 51669184000.

The previous prime is 135423404173. The next prime is 135423404243. The reversal of 135423404240 is 42404324531.

It is a junction number, because it is equal to n+sod(n) for n = 135423404197 and 135423404206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135423404243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5572115 + ... + 5596365.

Almost surely, 2^135423404240 is an apocalyptic number.

135423404240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135423404240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165016719504).

135423404240 is an abundant number, since it is smaller than the sum of its proper divisors (194610034768).

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

135423404240 is a wasteful number, since it uses less digits than its factorization.

135423404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24405 (or 24370 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 135423404240 its reverse (42404324531), we get a palindrome (177827728771).

The spelling of 135423404240 in words is "one hundred thirty-five billion, four hundred twenty-three million, four hundred four thousand, two hundred forty".