135631408 has 40 divisors (see below), whose sum is σ = 287370000. Its totient is φ = 61501440.

The previous prime is 135631393. The next prime is 135631453. The reversal of 135631408 is 804136531.

It is a self number, because there is not a number n which added to its sum of digits gives 135631408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107968 + ... + 109216.

It is an arithmetic number, because the mean of its divisors is an integer number (7184250).

Almost surely, 2^135631408 is an apocalyptic number.

It is an amenable number.

135631408 is an abundant number, since it is smaller than the sum of its proper divisors (151738592).

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

135631408 is a wasteful number, since it uses less digits than its factorization.

135631408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885 (or 1879 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 135631408 is about 11646.0898158996. The cubic root of 135631408 is about 513.7913125789.

Adding to 135631408 its reverse (804136531), we get a palindrome (939767939).

The spelling of 135631408 in words is "one hundred thirty-five million, six hundred thirty-one thousand, four hundred eight".