135811388 has 24 divisors (see below), whose sum is σ = 244544832. Its totient is φ = 65963264.

The previous prime is 135811339. The next prime is 135811391. The reversal of 135811388 is 883118531.

It is a super-2 number, since 2×135811388² = 36889466220973088, which contains 22 as substring.

It is a congruent number.

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, 23120 + ... + 28392.

It is an arithmetic number, because the mean of its divisors is an integer number (10189368).

Almost surely, 2^135811388 is an apocalyptic number.

It is an amenable number.

135811388 is a deficient number, since it is larger than the sum of its proper divisors (108733444).

135811388 is a wasteful number, since it uses less digits than its factorization.

135811388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5461 (or 5459 counting only the distinct ones).

The product of its digits is 23040, while the sum is 38.

The square root of 135811388 is about 11653.8143112030. The cubic root of 135811388 is about 514.0184755177.

The spelling of 135811388 in words is "one hundred thirty-five million, eight hundred eleven thousand, three hundred eighty-eight".