28060656021 has 12 divisors (see below), whose sum is σ = 40567288320. Its totient is φ = 18690844200.

The previous prime is 28060656007. The next prime is 28060656023. The reversal of 28060656021 is 12065606082.

28060656021 is a `hidden beast` number, since 28 + 0 + 606 + 5 + 6 + 0 + 21 = 666.

It is not a de Polignac number, because 28060656021 - 2²⁵ = 28027101589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28060656023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1344051 + ... + 1364768.

It is an arithmetic number, because the mean of its divisors is an integer number (3380607360).

Almost surely, 2^28060656021 is an apocalyptic number.

It is an amenable number.

28060656021 is a deficient number, since it is larger than the sum of its proper divisors (12506632299).

28060656021 is a wasteful number, since it uses less digits than its factorization.

28060656021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709976 (or 2709973 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 28060656021 in words is "twenty-eight billion, sixty million, six hundred fifty-six thousand, twenty-one".