19479904 has 48 divisors (see below), whose sum is σ = 40279680. Its totient is φ = 9262080.

The previous prime is 19479869. The next prime is 19479917. The reversal of 19479904 is 40997491.

It is a congruent number.

It is an unprimeable number.

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, 72282 + ... + 72550.

It is an arithmetic number, because the mean of its divisors is an integer number (839160).

Almost surely, 2^19479904 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 19479904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20139840).

19479904 is an abundant number, since it is smaller than the sum of its proper divisors (20799776).

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

19479904 is a wasteful number, since it uses less digits than its factorization.

19479904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 19479904 is about 4413.6044226913. The cubic root of 19479904 is about 269.0681363954.

The spelling of 19479904 in words is "nineteen million, four hundred seventy-nine thousand, nine hundred four".