18135528 has 32 divisors (see below), whose sum is σ = 45511200. Its totient is φ = 6022208.

The previous prime is 18135521. The next prime is 18135539. The reversal of 18135528 is 82553181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18135521) 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, 5743 + ... + 8321.

It is an arithmetic number, because the mean of its divisors is an integer number (1422225).

Almost surely, 2^18135528 is an apocalyptic number.

It is an amenable number.

18135528 is an abundant number, since it is smaller than the sum of its proper divisors (27375672).

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

18135528 is a wasteful number, since it uses less digits than its factorization.

18135528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881 (or 2877 counting only the distinct ones).

The product of its digits is 9600, while the sum is 33.

The square root of 18135528 is about 4258.5828628782. The cubic root of 18135528 is about 262.7302433420.

It can be divided in two parts, 1813552 and 8, that added together give a triangular number (1813560 = T₁₉₀₄).

The spelling of 18135528 in words is "eighteen million, one hundred thirty-five thousand, five hundred twenty-eight".