1628447228 has 12 divisors (see below), whose sum is σ = 2851773120. Its totient is φ = 813654912.

The previous prime is 1628447209. The next prime is 1628447239. The reversal of 1628447228 is 8227448261.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

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, 135701 + ... + 147212.

It is an arithmetic number, because the mean of its divisors is an integer number (237647760).

Almost surely, 2^1628447228 is an apocalyptic number.

It is an amenable number.

1628447228 is a deficient number, since it is larger than the sum of its proper divisors (1223325892).

1628447228 is a wasteful number, since it uses less digits than its factorization.

1628447228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284356 (or 284354 counting only the distinct ones).

The product of its digits is 344064, while the sum is 44.

The square root of 1628447228 is about 40354.0236903335. The cubic root of 1628447228 is about 1176.4980989235.

The spelling of 1628447228 in words is "one billion, six hundred twenty-eight million, four hundred forty-seven thousand, two hundred twenty-eight".