135061440 has 56 divisors (see below), whose sum is σ = 428823120. Its totient is φ = 36016128.

The previous prime is 135061387. The next prime is 135061441. The reversal of 135061440 is 44160531.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 135061440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135061441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69385 + ... + 71304.

Almost surely, 2^135061440 is an apocalyptic number.

135061440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135061440 is an abundant number, since it is smaller than the sum of its proper divisors (293761680).

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

135061440 is a wasteful number, since it uses less digits than its factorization.

135061440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140709 (or 140699 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 135061440 is about 11621.5936944982. The cubic root of 135061440 is about 513.0705951053.

Subtracting from 135061440 its reverse (44160531), we obtain a palindrome (90900909).

The spelling of 135061440 in words is "one hundred thirty-five million, sixty-one thousand, four hundred forty".