18899448 has 16 divisors (see below), whose sum is σ = 47248680. Its totient is φ = 6299808.

The previous prime is 18899381. The next prime is 18899449. The reversal of 18899448 is 84499881.

It is a self number, because there is not a number n which added to its sum of digits gives 18899448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18899449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393715 + ... + 393762.

Almost surely, 2^18899448 is an apocalyptic number.

It is an amenable number.

18899448 is an abundant number, since it is smaller than the sum of its proper divisors (28349232).

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

18899448 is a wasteful number, since it uses less digits than its factorization.

18899448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787486 (or 787482 counting only the distinct ones).

The product of its digits is 663552, while the sum is 51.

The square root of 18899448 is about 4347.3495373618. The cubic root of 18899448 is about 266.3686072541.

The spelling of 18899448 in words is "eighteen million, eight hundred ninety-nine thousand, four hundred forty-eight".