18489884 has 24 divisors (see below), whose sum is σ = 38588928. Its totient is φ = 7579440.

The previous prime is 18489841. The next prime is 18489901. The reversal of 18489884 is 48898481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13712 + ... + 14999.

It is an arithmetic number, because the mean of its divisors is an integer number (1607872).

Almost surely, 2^18489884 is an apocalyptic number.

18489884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18489884 is an abundant number, since it is smaller than the sum of its proper divisors (20099044).

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

18489884 is a wasteful number, since it uses less digits than its factorization.

18489884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28745 (or 28743 counting only the distinct ones).

The product of its digits is 589824, while the sum is 50.

The square root of 18489884 is about 4299.9865116068. The cubic root of 18489884 is about 264.4304082552.

The spelling of 18489884 in words is "eighteen million, four hundred eighty-nine thousand, eight hundred eighty-four".