19928038 has 16 divisors (see below), whose sum is σ = 32341680. Its totient is φ = 9154656.

The previous prime is 19928033. The next prime is 19928039. The reversal of 19928038 is 83082991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19928033) 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 7 ways as a sum of consecutive naturals, for example, 4281 + ... + 7627.

It is an arithmetic number, because the mean of its divisors is an integer number (2021355).

Almost surely, 2^19928038 is an apocalyptic number.

19928038 is a deficient number, since it is larger than the sum of its proper divisors (12413642).

19928038 is a wasteful number, since it uses less digits than its factorization.

19928038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 19928038 is about 4464.0831085454. The cubic root of 19928038 is about 271.1158122126.

The spelling of 19928038 in words is "nineteen million, nine hundred twenty-eight thousand, thirty-eight".