18283904 has 32 divisors (see below), whose sum is σ = 36885240. Its totient is φ = 9026560.

The previous prime is 18283897. The next prime is 18283913. The reversal of 18283904 is 40938281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×18283904² = 668602290962432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9764 + ... + 11484.

Almost surely, 2^18283904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18283904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18442620).

18283904 is an abundant number, since it is smaller than the sum of its proper divisors (18601336).

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

18283904 is an equidigital number, since it uses as much as digits as its factorization.

18283904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818 (or 1806 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 18283904 is about 4275.9681944561. The cubic root of 18283904 is about 263.4448081508. Note that the first 3 decimals are identical.

The spelling of 18283904 in words is "eighteen million, two hundred eighty-three thousand, nine hundred four".