19478228 has 24 divisors (see below), whose sum is σ = 42498624. Its totient is φ = 7588800.

The previous prime is 19478203. The next prime is 19478237. The reversal of 19478228 is 82287491.

It is a nialpdrome in base 11.

It is a congruent number.

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, 31313 + ... + 31928.

It is an arithmetic number, because the mean of its divisors is an integer number (1770776).

Almost surely, 2^19478228 is an apocalyptic number.

It is an amenable number.

19478228 is an abundant number, since it is smaller than the sum of its proper divisors (23020396).

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

19478228 is a wasteful number, since it uses less digits than its factorization.

19478228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63263 (or 63261 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 19478228 is about 4413.4145511157. The cubic root of 19478228 is about 269.0604195345.

The spelling of 19478228 in words is "nineteen million, four hundred seventy-eight thousand, two hundred twenty-eight".