135815638 has 8 divisors (see below), whose sum is σ = 232826832. Its totient is φ = 58206696.

The previous prime is 135815623. The next prime is 135815651. The reversal of 135815638 is 836518531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 135815638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4850545 + ... + 4850572.

It is an arithmetic number, because the mean of its divisors is an integer number (29103354).

Almost surely, 2^135815638 is an apocalyptic number.

135815638 is a deficient number, since it is larger than the sum of its proper divisors (97011194).

135815638 is an equidigital number, since it uses as much as digits as its factorization.

135815638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9701126.

The product of its digits is 86400, while the sum is 40.

The square root of 135815638 is about 11653.9966535090. The cubic root of 135815638 is about 514.0238372569.

The spelling of 135815638 in words is "one hundred thirty-five million, eight hundred fifteen thousand, six hundred thirty-eight".