18448444 has 12 divisors (see below), whose sum is σ = 36896944. Its totient is φ = 7906464.

The previous prime is 18448429. The next prime is 18448447. The reversal of 18448444 is 44484481.

18448444 is an admirable number.

It is a super-2 number, since 2×18448444² = 680690172042272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18448447) 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, 329409 + ... + 329464.

Almost surely, 2^18448444 is an apocalyptic number.

18448444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18448444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18448444 is a wasteful number, since it uses less digits than its factorization.

18448444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658884 (or 658882 counting only the distinct ones).

The product of its digits is 65536, while the sum is 37.

The square root of 18448444 is about 4295.1651889072. The cubic root of 18448444 is about 264.2327110933.

It can be divided in two parts, 184484 and 44, that added together give a triangular number (184528 = T₆₀₇).

The spelling of 18448444 in words is "eighteen million, four hundred forty-eight thousand, four hundred forty-four".