19794228 has 24 divisors (see below), whose sum is σ = 47059488. Its totient is φ = 6473376.

The previous prime is 19794221. The next prime is 19794241. The reversal of 19794228 is 82249791.

It is a super-2 number, since 2×19794228² = 783622924231968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19794228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19794221) 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, 14926 + ... + 16197.

It is an arithmetic number, because the mean of its divisors is an integer number (1960812).

Almost surely, 2^19794228 is an apocalyptic number.

It is an amenable number.

19794228 is an abundant number, since it is smaller than the sum of its proper divisors (27265260).

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

19794228 is a wasteful number, since it uses less digits than its factorization.

19794228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31183 (or 31181 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 19794228 is about 4449.0704647151. The cubic root of 19794228 is about 270.5076320988.

The spelling of 19794228 in words is "nineteen million, seven hundred ninety-four thousand, two hundred twenty-eight".