135638426 has 32 divisors (see below), whose sum is σ = 259573248. Its totient is φ = 51614640.

The previous prime is 135638417. The next prime is 135638431. The reversal of 135638426 is 624836531.

It is a self number, because there is not a number n which added to its sum of digits gives 135638426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3620 + ... + 16863.

It is an arithmetic number, because the mean of its divisors is an integer number (8111664).

Almost surely, 2^135638426 is an apocalyptic number.

135638426 is a deficient number, since it is larger than the sum of its proper divisors (123934822).

135638426 is a wasteful number, since it uses less digits than its factorization.

135638426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20546.

The product of its digits is 103680, while the sum is 38.

The square root of 135638426 is about 11646.3911148476. The cubic root of 135638426 is about 513.8001741578.

The spelling of 135638426 in words is "one hundred thirty-five million, six hundred thirty-eight thousand, four hundred twenty-six".