19439648 has 24 divisors (see below), whose sum is σ = 38847312. Its totient is φ = 9573696.

The previous prime is 19439639. The next prime is 19439683. The reversal of 19439648 is 84693491.

It is a junction number, because it is equal to n+sod(n) for n = 19439599 and 19439608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2390 + ... + 6677.

It is an arithmetic number, because the mean of its divisors is an integer number (1618638).

Almost surely, 2^19439648 is an apocalyptic number.

It is an amenable number.

19439648 is a deficient number, since it is larger than the sum of its proper divisors (19407664).

19439648 is an equidigital number, since it uses as much as digits as its factorization.

19439648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9144 (or 9136 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 19439648 is about 4409.0416192184. The cubic root of 19439648 is about 268.8826618881.

The spelling of 19439648 in words is "nineteen million, four hundred thirty-nine thousand, six hundred forty-eight".