135508780 has 24 divisors (see below), whose sum is σ = 310438800. Its totient is φ = 49275840.

The previous prime is 135508729. The next prime is 135508783. The reversal of 135508780 is 87805531.

It is not an unprimeable number, because it can be changed into a prime (135508783) 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, 307755 + ... + 308194.

It is an arithmetic number, because the mean of its divisors is an integer number (12934950).

Almost surely, 2^135508780 is an apocalyptic number.

135508780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135508780 is an abundant number, since it is smaller than the sum of its proper divisors (174930020).

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

135508780 is a wasteful number, since it uses less digits than its factorization.

135508780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615969 (or 615967 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 135508780 is about 11640.8238540062. The cubic root of 135508780 is about 513.6364217126.

The spelling of 135508780 in words is "one hundred thirty-five million, five hundred eight thousand, seven hundred eighty".