135235980 has 120 divisors (see below), whose sum is σ = 462868560. Its totient is φ = 32780160.

The previous prime is 135235979. The next prime is 135235987. The reversal of 135235980 is 89532531.

135235980 is a `hidden beast` number, since 1 + 3 + 523 + 59 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135235987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14026 + ... + 21614.

It is an arithmetic number, because the mean of its divisors is an integer number (3857238).

Almost surely, 2^135235980 is an apocalyptic number.

135235980 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 135235980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231434280).

135235980 is an abundant number, since it is smaller than the sum of its proper divisors (327632580).

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

135235980 is a wasteful number, since it uses less digits than its factorization.

135235980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7621 (or 7610 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 135235980 is about 11629.1005671118. The cubic root of 135235980 is about 513.2915138061.

It can be divided in two parts, 13523 and 5980, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 135235980 in words is "one hundred thirty-five million, two hundred thirty-five thousand, nine hundred eighty".