28443652 has 12 divisors (see below), whose sum is σ = 52704540. Its totient is φ = 13385216.

The previous prime is 28443643. The next prime is 28443661. The reversal of 28443652 is 25634482.

It is an interprime number because it is at equal distance from previous prime (28443643) and next prime (28443661).

It can be written as a sum of positive squares in 2 ways, for example, as 16842816 + 11600836 = 4104^2 + 3406^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209077 + ... + 209212.

It is an arithmetic number, because the mean of its divisors is an integer number (4392045).

Almost surely, 2^28443652 is an apocalyptic number.

It is an amenable number.

28443652 is a deficient number, since it is larger than the sum of its proper divisors (24260888).

28443652 is a wasteful number, since it uses less digits than its factorization.

28443652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418310 (or 418308 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

The square root of 28443652 is about 5333.2590411492. The cubic root of 28443652 is about 305.2542965636.

The spelling of 28443652 in words is "twenty-eight million, four hundred forty-three thousand, six hundred fifty-two".