28006644220682 has 32 divisors (see below), whose sum is σ = 42889324262400. Its totient is φ = 13713324375168.

The previous prime is 28006644220649. The next prime is 28006644220699. The reversal of 28006644220682 is 28602244660082.

It is a super-2 number, since 2×28006644220682² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28006644220682.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47181743 + ... + 47771645.

It is an arithmetic number, because the mean of its divisors is an integer number (1340291383200).

Almost surely, 2^{28006644220682} is an apocalyptic number.

28006644220682 is a deficient number, since it is larger than the sum of its proper divisors (14882680041718).

28006644220682 is a wasteful number, since it uses less digits than its factorization.

28006644220682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592550.

The product of its (nonzero) digits is 3538944, while the sum is 50.

The spelling of 28006644220682 in words is "twenty-eight trillion, six billion, six hundred forty-four million, two hundred twenty thousand, six hundred eighty-two".