19390228 has 48 divisors (see below), whose sum is σ = 40360320. Its totient is φ = 8035200.

The previous prime is 19390223. The next prime is 19390237. The reversal of 19390228 is 82209391.

It is a junction number, because it is equal to n+sod(n) for n = 19390193 and 19390202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19390223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62193 + ... + 62503.

It is an arithmetic number, because the mean of its divisors is an integer number (840840).

Almost surely, 2^19390228 is an apocalyptic number.

It is an amenable number.

19390228 is an abundant number, since it is smaller than the sum of its proper divisors (20970092).

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

19390228 is a wasteful number, since it uses less digits than its factorization.

19390228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 19390228 is about 4403.4336602247. The cubic root of 19390228 is about 268.6546149330.

The spelling of 19390228 in words is "nineteen million, three hundred ninety thousand, two hundred twenty-eight".