28643222280526 has 16 divisors (see below), whose sum is σ = 49322858102784. Its totient is φ = 12220618857624.

The previous prime is 28643222280467. The next prime is 28643222280643. The reversal of 28643222280526 is 62508222234682.

It is a super-2 number, since 2×28643222280526² (a number of 28 digits) contains 22 as substring.

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, 4587316270 + ... + 4587322513.

It is an arithmetic number, because the mean of its divisors is an integer number (3082678631424).

Almost surely, 2^{28643222280526} is an apocalyptic number.

28643222280526 is a deficient number, since it is larger than the sum of its proper divisors (20679635822258).

28643222280526 is a wasteful number, since it uses less digits than its factorization.

28643222280526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9174639015.

The product of its (nonzero) digits is 8847360, while the sum is 52.

The spelling of 28643222280526 in words is "twenty-eight trillion, six hundred forty-three billion, two hundred twenty-two million, two hundred eighty thousand, five hundred twenty-six".