135489798 has 72 divisors (see below), whose sum is σ = 320954400. Its totient is φ = 41253408.

The previous prime is 135489787. The next prime is 135489799. The reversal of 135489798 is 897984531.

135489798 is a `hidden beast` number, since 1 + 3 + 548 + 9 + 7 + 98 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135489799) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 188083 + ... + 188801.

It is an arithmetic number, because the mean of its divisors is an integer number (4457700).

Almost surely, 2^135489798 is an apocalyptic number.

135489798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 135489798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160477200).

135489798 is an abundant number, since it is smaller than the sum of its proper divisors (185464602).

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

135489798 is a wasteful number, since it uses less digits than its factorization.

135489798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 772 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 135489798 is about 11640.0085051515. The cubic root of 135489798 is about 513.6124372843.

The spelling of 135489798 in words is "one hundred thirty-five million, four hundred eighty-nine thousand, seven hundred ninety-eight".