28079821458 has 48 divisors (see below), whose sum is σ = 65808340416. Its totient is φ = 8601867360.

The previous prime is 28079821411. The next prime is 28079821481. The reversal of 28079821458 is 85412897082.

28079821458 is a `hidden beast` number, since 2 + 80 + 7 + 98 + 21 + 458 = 666.

It is a super-2 number, since 2×28079821458² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211198 + ... + 317433.

It is an arithmetic number, because the mean of its divisors is an integer number (1371007092).

Almost surely, 2^28079821458 is an apocalyptic number.

28079821458 is an abundant number, since it is smaller than the sum of its proper divisors (37728518958).

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

28079821458 is a wasteful number, since it uses less digits than its factorization.

28079821458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528879 (or 528876 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 28079821458 in words is "twenty-eight billion, seventy-nine million, eight hundred twenty-one thousand, four hundred fifty-eight".