135115640 has 64 divisors (see below), whose sum is σ = 343116000. Its totient is φ = 47434240.

The previous prime is 135115597. The next prime is 135115657. The reversal of 135115640 is 46511531.

It is a congruent number.

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, 7466 + ... + 18054.

Almost surely, 2^135115640 is an apocalyptic number.

135115640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135115640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171558000).

135115640 is an abundant number, since it is smaller than the sum of its proper divisors (208000360).

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

135115640 is a wasteful number, since it uses less digits than its factorization.

135115640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10640 (or 10636 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 135115640 is about 11623.9253266700. The cubic root of 135115640 is about 513.1392174726.

The spelling of 135115640 in words is "one hundred thirty-five million, one hundred fifteen thousand, six hundred forty".