19928480 has 144 divisors (see below), whose sum is σ = 56445984. Its totient is φ = 6589440.

The previous prime is 19928453. The next prime is 19928509. The reversal of 19928480 is 8482991.

It is a super-2 number, since 2×19928480² = 794288630220800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 297407 + ... + 297473.

It is an arithmetic number, because the mean of its divisors is an integer number (391986).

Almost surely, 2^19928480 is an apocalyptic number.

19928480 is a gapful number since it is divisible by the number (10) 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 19928480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28222992).

19928480 is an abundant number, since it is smaller than the sum of its proper divisors (36517504).

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

19928480 is a wasteful number, since it uses less digits than its factorization.

19928480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 19928480 is about 4464.1326145176. The cubic root of 19928480 is about 271.1178166297.

The spelling of 19928480 in words is "nineteen million, nine hundred twenty-eight thousand, four hundred eighty".