28064640385894 has 8 divisors (see below), whose sum is σ = 48110812090128. Its totient is φ = 12027703022520.

The previous prime is 28064640385867. The next prime is 28064640385909. The reversal of 28064640385894 is 49858304646082.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1002308585197 + ... + 1002308585224.

It is an arithmetic number, because the mean of its divisors is an integer number (6013851511266).

Almost surely, 2^{28064640385894} is an apocalyptic number.

28064640385894 is a deficient number, since it is larger than the sum of its proper divisors (20046171704234).

28064640385894 is a wasteful number, since it uses less digits than its factorization.

28064640385894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004617170430.

The product of its (nonzero) digits is 318504960, while the sum is 67.

The spelling of 28064640385894 in words is "twenty-eight trillion, sixty-four billion, six hundred forty million, three hundred eighty-five thousand, eight hundred ninety-four".