19479944 has 32 divisors (see below), whose sum is σ = 40098240. Its totient is φ = 8798400.

The previous prime is 19479937. The next prime is 19479947. The reversal of 19479944 is 44997491.

It is not an unprimeable number, because it can be changed into a prime (19479947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15317 + ... + 16539.

It is an arithmetic number, because the mean of its divisors is an integer number (1253070).

Almost surely, 2^19479944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19479944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20049120).

19479944 is an abundant number, since it is smaller than the sum of its proper divisors (20618296).

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

19479944 is a wasteful number, since it uses less digits than its factorization.

19479944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421 (or 1417 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 19479944 is about 4413.6089541327. The cubic root of 19479944 is about 269.0683205633.

The spelling of 19479944 in words is "nineteen million, four hundred seventy-nine thousand, nine hundred forty-four".