18028532 has 6 divisors (see below), whose sum is σ = 31549938. Its totient is φ = 9014264.

The previous prime is 18028529. The next prime is 18028541. The reversal of 18028532 is 23582081.

It can be written as a sum of positive squares in only one way, i.e., 18028516 + 16 = 4246^2 + 4^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18028495 and 18028504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2253563 + ... + 2253570.

It is an arithmetic number, because the mean of its divisors is an integer number (5258323).

Almost surely, 2^18028532 is an apocalyptic number.

It is an amenable number.

18028532 is a deficient number, since it is larger than the sum of its proper divisors (13521406).

18028532 is a wasteful number, since it uses less digits than its factorization.

18028532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507137 (or 4507135 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 18028532 is about 4246.0018841258. The cubic root of 18028532 is about 262.2125385307.

The spelling of 18028532 in words is "eighteen million, twenty-eight thousand, five hundred thirty-two".