135087720 has 128 divisors (see below), whose sum is σ = 430272000. Its totient is φ = 33834240.

The previous prime is 135087697. The next prime is 135087727. The reversal of 135087720 is 27780531.

It is not an unprimeable number, because it can be changed into a prime (135087727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 407955 + ... + 408285.

It is an arithmetic number, because the mean of its divisors is an integer number (3361500).

Almost surely, 2^135087720 is an apocalyptic number.

135087720 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 135087720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215136000).

135087720 is an abundant number, since it is smaller than the sum of its proper divisors (295184280).

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

135087720 is a wasteful number, since it uses less digits than its factorization.

135087720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 135087720 is about 11622.7242933832. The cubic root of 135087720 is about 513.1038703831.

The spelling of 135087720 in words is "one hundred thirty-five million, eighty-seven thousand, seven hundred twenty".