135640432 has 20 divisors (see below), whose sum is σ = 263072200. Its totient is φ = 67750848.

The previous prime is 135640429. The next prime is 135640451. The reversal of 135640432 is 234046531.

It is a self number, because there is not a number n which added to its sum of digits gives 135640432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14194 + ... + 21742.

It is an arithmetic number, because the mean of its divisors is an integer number (13153610).

Almost surely, 2^135640432 is an apocalyptic number.

It is an amenable number.

135640432 is a deficient number, since it is larger than the sum of its proper divisors (127431768).

135640432 is a wasteful number, since it uses less digits than its factorization.

135640432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8680 (or 8674 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 135640432 is about 11646.4772356279. The cubic root of 135640432 is about 513.8027070636.

Adding to 135640432 its reverse (234046531), we get a palindrome (369686963).

The spelling of 135640432 in words is "one hundred thirty-five million, six hundred forty thousand, four hundred thirty-two".