19898472 has 64 divisors (see below), whose sum is σ = 57139200. Its totient is φ = 5711040.

The previous prime is 19898471. The next prime is 19898477. The reversal of 19898472 is 27489891.

It is not an unprimeable number, because it can be changed into a prime (19898471) 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 15 ways as a sum of consecutive naturals, for example, 3033 + ... + 6999.

It is an arithmetic number, because the mean of its divisors is an integer number (892800).

Almost surely, 2^19898472 is an apocalyptic number.

19898472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19898472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28569600).

19898472 is an abundant number, since it is smaller than the sum of its proper divisors (37240728).

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

19898472 is a wasteful number, since it uses less digits than its factorization.

19898472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006 (or 4002 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 19898472 is about 4460.7703370606. The cubic root of 19898472 is about 270.9816665838.

The spelling of 19898472 in words is "nineteen million, eight hundred ninety-eight thousand, four hundred seventy-two".