18489128 has 32 divisors (see below), whose sum is σ = 41707200. Its totient is φ = 7506432.

The previous prime is 18489101. The next prime is 18489131. The reversal of 18489128 is 82198481.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7625 + ... + 9752.

It is an arithmetic number, because the mean of its divisors is an integer number (1303350).

Almost surely, 2^18489128 is an apocalyptic number.

It is an amenable number.

18489128 is an abundant number, since it is smaller than the sum of its proper divisors (23218072).

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

18489128 is a wasteful number, since it uses less digits than its factorization.

18489128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17409 (or 17405 counting only the distinct ones).

The product of its digits is 36864, while the sum is 41.

The square root of 18489128 is about 4299.8986034557. The cubic root of 18489128 is about 264.4268042644.

The spelling of 18489128 in words is "eighteen million, four hundred eighty-nine thousand, one hundred twenty-eight".