28444946 has 12 divisors (see below), whose sum is σ = 43015338. Its totient is φ = 14107392.

The previous prime is 28444937. The next prime is 28444963. The reversal of 28444946 is 64944482.

It can be written as a sum of positive squares in 3 ways, for example, as 26635921 + 1809025 = 5161^2 + 1345^2 .

It is a super-2 number, since 2×28444946² = 1618229905885832, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49010 + ... + 49586.

Almost surely, 2^28444946 is an apocalyptic number.

28444946 is a deficient number, since it is larger than the sum of its proper divisors (14570392).

28444946 is an equidigital number, since it uses as much as digits as its factorization.

28444946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893 (or 736 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 28444946 is about 5333.3803539594. The cubic root of 28444946 is about 305.2589255176.

The spelling of 28444946 in words is "twenty-eight million, four hundred forty-four thousand, nine hundred forty-six".