28282359921 has 16 divisors (see below), whose sum is σ = 40975011840. Its totient is φ = 17286330960.

The previous prime is 28282359899. The next prime is 28282359967. The reversal of 28282359921 is 12995328282.

It is not a de Polignac number, because 28282359921 - 2²⁷ = 28148142193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28282359991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8001165 + ... + 8004698.

It is an arithmetic number, because the mean of its divisors is an integer number (2560938240).

Almost surely, 2^28282359921 is an apocalyptic number.

It is an amenable number.

28282359921 is a deficient number, since it is larger than the sum of its proper divisors (12692651919).

28282359921 is a wasteful number, since it uses less digits than its factorization.

28282359921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16005916.

The product of its digits is 1244160, while the sum is 51.

The spelling of 28282359921 in words is "twenty-eight billion, two hundred eighty-two million, three hundred fifty-nine thousand, nine hundred twenty-one".