19794428 has 12 divisors (see below), whose sum is σ = 36463560. Its totient is φ = 9376272.

The previous prime is 19794427. The next prime is 19794449. The reversal of 19794428 is 82449791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19794427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130151 + ... + 130302.

It is an arithmetic number, because the mean of its divisors is an integer number (3038630).

Almost surely, 2^19794428 is an apocalyptic number.

It is an amenable number.

19794428 is a deficient number, since it is larger than the sum of its proper divisors (16669132).

19794428 is a wasteful number, since it uses less digits than its factorization.

19794428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260476 (or 260474 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 19794428 is about 4449.0929412634. The cubic root of 19794428 is about 270.5085431614.

The spelling of 19794428 in words is "nineteen million, seven hundred ninety-four thousand, four hundred twenty-eight".