19789228 has 12 divisors (see below), whose sum is σ = 35567392. Its totient is φ = 9627120.

The previous prime is 19789213. The next prime is 19789229. The reversal of 19789228 is 82298791.

It is a super-2 number, since 2×19789228² = 783227089671968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19789229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66708 + ... + 67003.

Almost surely, 2^19789228 is an apocalyptic number.

It is an amenable number.

19789228 is a deficient number, since it is larger than the sum of its proper divisors (15778164).

19789228 is a wasteful number, since it uses less digits than its factorization.

19789228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133752 (or 133750 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 19789228 is about 4448.5085140977. The cubic root of 19789228 is about 270.4848535383.

The spelling of 19789228 in words is "nineteen million, seven hundred eighty-nine thousand, two hundred twenty-eight".