28189652 has 12 divisors (see below), whose sum is σ = 49370580. Its totient is φ = 14083776.

The previous prime is 28189643. The next prime is 28189657. The reversal of 28189652 is 25698182.

It can be written as a sum of positive squares in 2 ways, for example, as 1522756 + 26666896 = 1234^2 + 5164^2 .

It is a super-2 number, since 2×28189652² = 1589312959762208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28189657) 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, 6224 + ... + 9752.

It is an arithmetic number, because the mean of its divisors is an integer number (4114215).

Almost surely, 2^28189652 is an apocalyptic number.

It is an amenable number.

28189652 is a deficient number, since it is larger than the sum of its proper divisors (21180928).

28189652 is a wasteful number, since it uses less digits than its factorization.

28189652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5530 (or 5528 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 28189652 is about 5309.3928089754. The cubic root of 28189652 is about 304.3429445783.

The spelling of 28189652 in words is "twenty-eight million, one hundred eighty-nine thousand, six hundred fifty-two".