19389228 has 24 divisors (see below), whose sum is σ = 46346160. Its totient is φ = 6305280.

The previous prime is 19389211. The next prime is 19389241. The reversal of 19389228 is 82298391.

It is a self number, because there is not a number n which added to its sum of digits gives 19389228.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19213 + ... + 20196.

It is an arithmetic number, because the mean of its divisors is an integer number (1931090).

Almost surely, 2^19389228 is an apocalyptic number.

It is an amenable number.

19389228 is an abundant number, since it is smaller than the sum of its proper divisors (26956932).

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

19389228 is a wasteful number, since it uses less digits than its factorization.

19389228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39457 (or 39455 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 19389228 is about 4403.3201110071. The cubic root of 19389228 is about 268.6499964685.

The spelling of 19389228 in words is "nineteen million, three hundred eighty-nine thousand, two hundred twenty-eight".