28526671568 has 20 divisors (see below), whose sum is σ = 58521628260. Its totient is φ = 13424315904.

The previous prime is 28526671559. The next prime is 28526671577. The reversal of 28526671568 is 86517662582.

It is an interprime number because it is at equal distance from previous prime (28526671559) and next prime (28526671577).

It can be written as a sum of positive squares in 2 ways, for example, as 25214899264 + 3311772304 = 158792^2 + 57548^2 .

It is a super-3 number, since 3×28526671568³ (a number of 32 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52438463 + ... + 52439006.

It is an arithmetic number, because the mean of its divisors is an integer number (2926081413).

Almost surely, 2^28526671568 is an apocalyptic number.

It is an amenable number.

28526671568 is an abundant number, since it is smaller than the sum of its proper divisors (29994956692).

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

28526671568 is a wasteful number, since it uses less digits than its factorization.

28526671568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104877494 (or 104877488 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 56.

The spelling of 28526671568 in words is "twenty-eight billion, five hundred twenty-six million, six hundred seventy-one thousand, five hundred sixty-eight".