19389144 has 32 divisors (see below), whose sum is σ = 48600000. Its totient is φ = 6446112.

The previous prime is 19389133. The next prime is 19389151. The reversal of 19389144 is 44198391.

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, 11167 + ... + 12785.

It is an arithmetic number, because the mean of its divisors is an integer number (1518750).

Almost surely, 2^19389144 is an apocalyptic number.

It is an amenable number.

19389144 is an abundant number, since it is smaller than the sum of its proper divisors (29210856).

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

19389144 is a wasteful number, since it uses less digits than its factorization.

19389144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127 (or 2123 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 19389144 is about 4403.3105727396. The cubic root of 19389144 is about 268.6496085103.

The spelling of 19389144 in words is "nineteen million, three hundred eighty-nine thousand, one hundred forty-four".