135959640 has 32 divisors (see below), whose sum is σ = 407879280. Its totient is φ = 36255872.

The previous prime is 135959623. The next prime is 135959641. The reversal of 135959640 is 46959531.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 135959592 and 135959601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135959641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566379 + ... + 566618.

Almost surely, 2^135959640 is an apocalyptic number.

135959640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135959640 is an abundant number, since it is smaller than the sum of its proper divisors (271919640).

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

135959640 is a wasteful number, since it uses less digits than its factorization.

135959640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133011 (or 1133007 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 135959640 is about 11660.1732405655. The cubic root of 135959640 is about 514.2054420569.

The spelling of 135959640 in words is "one hundred thirty-five million, nine hundred fifty-nine thousand, six hundred forty".