18328356 has 30 divisors (see below), whose sum is σ = 47914790. Its totient is φ = 6109344.

The previous prime is 18328333. The next prime is 18328367. The reversal of 18328356 is 65382381.

It can be written as a sum of positive squares in only one way, i.e., 18198756 + 129600 = 4266^2 + 360^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18328356.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27961 + ... + 28608.

Almost surely, 2^18328356 is an apocalyptic number.

It is an amenable number.

18328356 is an abundant number, since it is smaller than the sum of its proper divisors (29586434).

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

18328356 is a wasteful number, since it uses less digits than its factorization.

18328356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56585 (or 56574 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 18328356 is about 4281.1629261218. The cubic root of 18328356 is about 263.6581318674.

The spelling of 18328356 in words is "eighteen million, three hundred twenty-eight thousand, three hundred fifty-six".