18885489 has 8 divisors (see below), whose sum is σ = 28777920. Its totient is φ = 10791696.

The previous prime is 18885473. The next prime is 18885497. The reversal of 18885489 is 98458881.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18885489 - 2⁴ = 18885473 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18885469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449634 + ... + 449675.

It is an arithmetic number, because the mean of its divisors is an integer number (3597240).

Almost surely, 2^18885489 is an apocalyptic number.

It is an amenable number.

18885489 is a deficient number, since it is larger than the sum of its proper divisors (9892431).

18885489 is an equidigital number, since it uses as much as digits as its factorization.

18885489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899319.

The product of its digits is 737280, while the sum is 51.

The square root of 18885489 is about 4345.7437798379. The cubic root of 18885489 is about 266.3030117724.

The spelling of 18885489 in words is "eighteen million, eight hundred eighty-five thousand, four hundred eighty-nine".