28806280564 has 12 divisors (see below), whose sum is σ = 53376343524. Its totient is φ = 13555896704.

The previous prime is 28806280561. The next prime is 28806280579. The reversal of 28806280564 is 46508260882.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9426856464 + 19379424100 = 97092^2 + 139210^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28806280561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211810819 + ... + 211810954.

It is an arithmetic number, because the mean of its divisors is an integer number (4448028627).

Almost surely, 2^28806280564 is an apocalyptic number.

It is an amenable number.

28806280564 is a deficient number, since it is larger than the sum of its proper divisors (24570062960).

28806280564 is a wasteful number, since it uses less digits than its factorization.

28806280564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423621794 (or 423621792 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 49.

The spelling of 28806280564 in words is "twenty-eight billion, eight hundred six million, two hundred eighty thousand, five hundred sixty-four".