28646394056 has 32 divisors (see below), whose sum is σ = 61928375040. Its totient is φ = 12168377088.

The previous prime is 28646394043. The next prime is 28646394067. The reversal of 28646394056 is 65049364682.

It is a super-2 number, since 2×28646394056² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28646393989 and 28646394007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2257136 + ... + 2269791.

It is an arithmetic number, because the mean of its divisors is an integer number (1935261720).

Almost surely, 2^28646394056 is an apocalyptic number.

It is an amenable number.

28646394056 is an abundant number, since it is smaller than the sum of its proper divisors (33281980984).

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

28646394056 is a wasteful number, since it uses less digits than its factorization.

28646394056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527053 (or 4527049 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 28646394056 in words is "twenty-eight billion, six hundred forty-six million, three hundred ninety-four thousand, fifty-six".