28217389224 has 32 divisors (see below), whose sum is σ = 70593624000. Its totient is φ = 9399109632.

The previous prime is 28217389223. The next prime is 28217389229. The reversal of 28217389224 is 42298371282.

It is a super-2 number, since 2×28217389224² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28217389223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383404 + ... + 451035.

It is an arithmetic number, because the mean of its divisors is an integer number (2206050750).

Almost surely, 2^28217389224 is an apocalyptic number.

28217389224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28217389224 is an abundant number, since it is smaller than the sum of its proper divisors (42376234776).

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

28217389224 is a wasteful number, since it uses less digits than its factorization.

28217389224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835857 (or 835853 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The spelling of 28217389224 in words is "twenty-eight billion, two hundred seventeen million, three hundred eighty-nine thousand, two hundred twenty-four".