135431328 has 24 divisors (see below), whose sum is σ = 355507488. Its totient is φ = 45143744.

The previous prime is 135431273. The next prime is 135431341. The reversal of 135431328 is 823134531.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 135431295 and 135431304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705276 + ... + 705467.

It is an arithmetic number, because the mean of its divisors is an integer number (14812812).

Almost surely, 2^135431328 is an apocalyptic number.

It is an amenable number.

135431328 is an abundant number, since it is smaller than the sum of its proper divisors (220076160).

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

135431328 is a wasteful number, since it uses less digits than its factorization.

135431328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410756 (or 1410748 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 135431328 is about 11637.4966380231. The cubic root of 135431328 is about 513.5385442912.

Adding to 135431328 its reverse (823134531), we get a palindrome (958565859).

The spelling of 135431328 in words is "one hundred thirty-five million, four hundred thirty-one thousand, three hundred twenty-eight".