28806651 has 8 divisors (see below), whose sum is σ = 42676560. Its totient is φ = 19204416.

The previous prime is 28806623. The next prime is 28806667. The reversal of 28806651 is 15660882.

It is a happy number.

It is not a de Polignac number, because 28806651 - 2⁷ = 28806523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28806671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533430 + ... + 533483.

It is an arithmetic number, because the mean of its divisors is an integer number (5334570).

Almost surely, 2^28806651 is an apocalyptic number.

28806651 is a deficient number, since it is larger than the sum of its proper divisors (13869909).

28806651 is a wasteful number, since it uses less digits than its factorization.

28806651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066922 (or 1066916 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28806651 is about 5367.1827805656. The cubic root of 28806651 is about 306.5473670859.

The spelling of 28806651 in words is "twenty-eight million, eight hundred six thousand, six hundred fifty-one".