19648208 has 10 divisors (see below), whose sum is σ = 38068434. Its totient is φ = 9824096.

The previous prime is 19648207. The next prime is 19648217. The reversal of 19648208 is 80284691.

It can be written as a sum of positive squares in only one way, i.e., 14684224 + 4963984 = 3832^2 + 2228^2 .

It is a super-2 number, since 2×19648208² = 772104155222528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19648201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613991 + ... + 614022.

Almost surely, 2^19648208 is an apocalyptic number.

It is an amenable number.

19648208 is a deficient number, since it is larger than the sum of its proper divisors (18420226).

19648208 is a wasteful number, since it uses less digits than its factorization.

19648208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228021 (or 1228015 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 19648208 is about 4432.6299191338. The cubic root of 19648208 is about 269.8408206685.

The spelling of 19648208 in words is "nineteen million, six hundred forty-eight thousand, two hundred eight".