135523380 has 96 divisors (see below), whose sum is σ = 398442240. Its totient is φ = 34370560.

The previous prime is 135523363. The next prime is 135523387. The reversal of 135523380 is 83325531.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135523387) 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, 122992 + ... + 124088.

It is an arithmetic number, because the mean of its divisors is an integer number (4150440).

Almost surely, 2^135523380 is an apocalyptic number.

135523380 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 135523380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199221120).

135523380 is an abundant number, since it is smaller than the sum of its proper divisors (262918860).

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

135523380 is a wasteful number, since it uses less digits than its factorization.

135523380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209 (or 1207 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 135523380 is about 11641.4509404971. The cubic root of 135523380 is about 513.6548678051.

The spelling of 135523380 in words is "one hundred thirty-five million, five hundred twenty-three thousand, three hundred eighty".