28025577808 has 40 divisors (see below), whose sum is σ = 55089974016. Its totient is φ = 13808995200.

The previous prime is 28025577799. The next prime is 28025577821. The reversal of 28025577808 is 80877552082.

It is a super-2 number, since 2×28025577808² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3245785 + ... + 3254407.

Almost surely, 2^28025577808 is an apocalyptic number.

It is an amenable number.

28025577808 is a deficient number, since it is larger than the sum of its proper divisors (27064396208).

28025577808 is a wasteful number, since it uses less digits than its factorization.

28025577808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11563 (or 11557 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 52.

The spelling of 28025577808 in words is "twenty-eight billion, twenty-five million, five hundred seventy-seven thousand, eight hundred eight".