1028666944 has 28 divisors (see below), whose sum is σ = 2069232844. Its totient is φ = 507285504.

The previous prime is 1028666939. The next prime is 1028666953. The reversal of 1028666944 is 4496668201.

It can be written as a sum of positive squares in 2 ways, for example, as 497825344 + 530841600 = 22312^2 + 23040^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1028666894 and 1028666903.

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, 105417 + ... + 114760.

It is an arithmetic number, because the mean of its divisors is an integer number (73901173).

Almost surely, 2^1028666944 is an apocalyptic number.

It is an amenable number.

1028666944 is an abundant number, since it is smaller than the sum of its proper divisors (1040565900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1028666944 is an equidigital number, since it uses as much as digits as its factorization.

1028666944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220262 (or 220252 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 1028666944 is about 32072.8381032923. The cubic root of 1028666944 is about 1009.4657645877.

The spelling of 1028666944 in words is "one billion, twenty-eight million, six hundred sixty-six thousand, nine hundred forty-four".