28216726624 has 12 divisors (see below), whose sum is σ = 55551680604. Its totient is φ = 14108363296.

The previous prime is 28216726619. The next prime is 28216726639. The reversal of 28216726624 is 42662761282.

It is a super-2 number, since 2×28216726624² (a number of 22 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 as a sum of consecutive naturals, namely, 440886322 + ... + 440886385.

It is an arithmetic number, because the mean of its divisors is an integer number (4629306717).

Almost surely, 2^28216726624 is an apocalyptic number.

It is an amenable number.

28216726624 is a deficient number, since it is larger than the sum of its proper divisors (27334953980).

28216726624 is an equidigital number, since it uses as much as digits as its factorization.

28216726624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881772717 (or 881772709 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The spelling of 28216726624 in words is "twenty-eight billion, two hundred sixteen million, seven hundred twenty-six thousand, six hundred twenty-four".