19928804 has 24 divisors (see below), whose sum is σ = 39953088. Its totient is φ = 8520480.

The previous prime is 19928803. The next prime is 19928807. The reversal of 19928804 is 40882991.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (19928803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20039 + ... + 21009.

It is an arithmetic number, because the mean of its divisors is an integer number (1664712).

Almost surely, 2^19928804 is an apocalyptic number.

19928804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19928804 is an abundant number, since it is smaller than the sum of its proper divisors (20024284).

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

19928804 is a wasteful number, since it uses less digits than its factorization.

19928804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715 (or 1713 counting only the distinct ones).

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

The square root of 19928804 is about 4464.1689036146. The cubic root of 19928804 is about 271.1192859121.

The spelling of 19928804 in words is "nineteen million, nine hundred twenty-eight thousand, eight hundred four".