1628447229 has 6 divisors (see below), whose sum is σ = 2352201566. Its totient is φ = 1085631480.

The previous prime is 1628447209. The next prime is 1628447239. The reversal of 1628447229 is 9227448261.

It can be written as a sum of positive squares in only one way, i.e., 1481480100 + 146967129 = 38490^2 + 12123^2 .

It is not a de Polignac number, because 1628447229 - 2⁹ = 1628446717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628447209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90469282 + ... + 90469299.

Almost surely, 2^1628447229 is an apocalyptic number.

It is an amenable number.

1628447229 is a deficient number, since it is larger than the sum of its proper divisors (723754337).

1628447229 is a wasteful number, since it uses less digits than its factorization.

1628447229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180938587 (or 180938584 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 1628447229 is about 40354.0237027239. The cubic root of 1628447229 is about 1176.4980991644.

The spelling of 1628447229 in words is "one billion, six hundred twenty-eight million, four hundred forty-seven thousand, two hundred twenty-nine".