19490208 has 24 divisors (see below), whose sum is σ = 51162048. Its totient is φ = 6496704.

The previous prime is 19490201. The next prime is 19490209. The reversal of 19490208 is 80209491.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (19490201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101416 + ... + 101607.

It is an arithmetic number, because the mean of its divisors is an integer number (2131752).

Almost surely, 2^19490208 is an apocalyptic number.

It is an amenable number.

19490208 is an abundant number, since it is smaller than the sum of its proper divisors (31671840).

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

19490208 is a wasteful number, since it uses less digits than its factorization.

19490208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203036 (or 203028 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 19490208 is about 4414.7715682694. The cubic root of 19490208 is about 269.1155697124.

Adding to 19490208 its reverse (80209491), we get a palindrome (99699699).

The spelling of 19490208 in words is "nineteen million, four hundred ninety thousand, two hundred eight".