28664652 has 48 divisors (see below), whose sum is σ = 71245440. Its totient is φ = 8938752.

The previous prime is 28664651. The next prime is 28664653. The reversal of 28664652 is 25646682.

It is an interprime number because it is at equal distance from previous prime (28664651) and next prime (28664653).

It is a super-2 number, since 2×28664652² = 1643324548562208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28664652.

It is not an unprimeable number, because it can be changed into a prime (28664651) 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 15 ways as a sum of consecutive naturals, for example, 45999 + ... + 46617.

It is an arithmetic number, because the mean of its divisors is an integer number (1484280).

Almost surely, 2^28664652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28664652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35622720).

28664652 is an abundant number, since it is smaller than the sum of its proper divisors (42580788).

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

28664652 is a wasteful number, since it uses less digits than its factorization.

28664652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 868 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 28664652 is about 5353.9379899285. The cubic root of 28664652 is about 306.0428407702.

The spelling of 28664652 in words is "twenty-eight million, six hundred sixty-four thousand, six hundred fifty-two".