2805221428 has 12 divisors (see below), whose sum is σ = 4971279040. Its totient is φ = 1384855992.

The previous prime is 2805221423. The next prime is 2805221449. The reversal of 2805221428 is 8241225082.

It is a super-2 number, since 2×2805221428² = 15738534520220718368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2805221393 and 2805221402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805221423) 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 3 ways as a sum of consecutive naturals, for example, 4438326 + ... + 4438957.

Almost surely, 2^2805221428 is an apocalyptic number.

It is an amenable number.

2805221428 is a deficient number, since it is larger than the sum of its proper divisors (2166057612).

2805221428 is a wasteful number, since it uses less digits than its factorization.

2805221428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8877366 (or 8877364 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The square root of 2805221428 is about 52964.3410985165. The cubic root of 2805221428 is about 1410.3353205475.

The spelling of 2805221428 in words is "two billion, eight hundred five million, two hundred twenty-one thousand, four hundred twenty-eight".