18448428 has 12 divisors (see below), whose sum is σ = 43046360. Its totient is φ = 6149472.

The previous prime is 18448403. The next prime is 18448429. The reversal of 18448428 is 82484481.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18448429) 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, 768673 + ... + 768696.

Almost surely, 2^18448428 is an apocalyptic number.

It is an amenable number.

18448428 is an abundant number, since it is smaller than the sum of its proper divisors (24597932).

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

18448428 is a wasteful number, since it uses less digits than its factorization.

18448428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537376 (or 1537374 counting only the distinct ones).

The product of its digits is 65536, while the sum is 39.

The square root of 18448428 is about 4295.1633263474. The cubic root of 18448428 is about 264.2326347052.

The spelling of 18448428 in words is "eighteen million, four hundred forty-eight thousand, four hundred twenty-eight".