18889044 has 24 divisors (see below), whose sum is σ = 45497088. Its totient is φ = 6093120.

The previous prime is 18889037. The next prime is 18889051. The reversal of 18889044 is 44098881.

It is an interprime number because it is at equal distance from previous prime (18889037) and next prime (18889051).

It is a junction number, because it is equal to n+sod(n) for n = 18888987 and 18889005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25017 + ... + 25760.

It is an arithmetic number, because the mean of its divisors is an integer number (1895712).

Almost surely, 2^18889044 is an apocalyptic number.

It is an amenable number.

18889044 is an abundant number, since it is smaller than the sum of its proper divisors (26608044).

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

18889044 is a wasteful number, since it uses less digits than its factorization.

18889044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50815 (or 50813 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 18889044 is about 4346.1527814839. The cubic root of 18889044 is about 266.3197203294.

The spelling of 18889044 in words is "eighteen million, eight hundred eighty-nine thousand, forty-four".