19144228 has 24 divisors (see below), whose sum is σ = 34675200. Its totient is φ = 9242688.

The previous prime is 19144219. The next prime is 19144231. The reversal of 19144228 is 82244191.

It is a self number, because there is not a number n which added to its sum of digits gives 19144228.

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, 14208 + ... + 15496.

It is an arithmetic number, because the mean of its divisors is an integer number (1444800).

Almost surely, 2^19144228 is an apocalyptic number.

It is an amenable number.

19144228 is a deficient number, since it is larger than the sum of its proper divisors (15530972).

19144228 is a wasteful number, since it uses less digits than its factorization.

19144228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419 (or 1417 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 19144228 is about 4375.4117520526. The cubic root of 19144228 is about 267.5136534796.

The spelling of 19144228 in words is "nineteen million, one hundred forty-four thousand, two hundred twenty-eight".