19898928 has 120 divisors (see below), whose sum is σ = 67059200. Its totient is φ = 5380992.

The previous prime is 19898917. The next prime is 19898929. The reversal of 19898928 is 82989891.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19898929) 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 23 ways as a sum of consecutive naturals, for example, 18633 + ... + 19671.

Almost surely, 2^19898928 is an apocalyptic number.

19898928 is a gapful number since it is divisible by the number (18) 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 19898928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33529600).

19898928 is an abundant number, since it is smaller than the sum of its proper divisors (47160272).

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

19898928 is a wasteful number, since it uses less digits than its factorization.

19898928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079 (or 1070 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 19898928 is about 4460.8214490159. The cubic root of 19898928 is about 270.9837365367.

The spelling of 19898928 in words is "nineteen million, eight hundred ninety-eight thousand, nine hundred twenty-eight".