19130228 has 12 divisors (see below), whose sum is σ = 36053220. Its totient is φ = 8829312.

The previous prime is 19130203. The next prime is 19130233. The reversal of 19130228 is 82203191.

It can be written as a sum of positive squares in 2 ways, for example, as 5895184 + 13235044 = 2428^2 + 3638^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 19130197 and 19130206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183893 + ... + 183996.

It is an arithmetic number, because the mean of its divisors is an integer number (3004435).

Almost surely, 2^19130228 is an apocalyptic number.

It is an amenable number.

19130228 is a deficient number, since it is larger than the sum of its proper divisors (16922992).

19130228 is a wasteful number, since it uses less digits than its factorization.

19130228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367906 (or 367904 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 19130228 is about 4373.8116100262. The cubic root of 19130228 is about 267.4484274759.

The spelling of 19130228 in words is "nineteen million, one hundred thirty thousand, two hundred twenty-eight".