28004406064680 has 64 divisors (see below), whose sum is σ = 84042584208000. Its totient is φ = 7465231304960.

The previous prime is 28004406064627. The next prime is 28004406064693. The reversal of 28004406064680 is 8646060440082.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40441380 + ... + 41128019.

It is an arithmetic number, because the mean of its divisors is an integer number (1313165378250).

Almost surely, 2^{28004406064680} is an apocalyptic number.

28004406064680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28004406064680 is an abundant number, since it is smaller than the sum of its proper divisors (56038178143320).

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

28004406064680 is a wasteful number, since it uses less digits than its factorization.

28004406064680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81572274 (or 81572270 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 48.

The spelling of 28004406064680 in words is "twenty-eight trillion, four billion, four hundred six million, sixty-four thousand, six hundred eighty".