28222439424 has 120 divisors (see below), whose sum is σ = 75715362240. Its totient is φ = 9350283264.

The previous prime is 28222439387. The next prime is 28222439447. The reversal of 28222439424 is 42493422282.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8501637 + ... + 8504955.

It is an arithmetic number, because the mean of its divisors is an integer number (630961352).

Almost surely, 2^28222439424 is an apocalyptic number.

28222439424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28222439424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37857681120).

28222439424 is an abundant number, since it is smaller than the sum of its proper divisors (47492922816).

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

28222439424 is an equidigital number, since it uses as much as digits as its factorization.

28222439424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523 (or 3497 counting only the distinct ones).

The product of its digits is 442368, while the sum is 42.

The spelling of 28222439424 in words is "twenty-eight billion, two hundred twenty-two million, four hundred thirty-nine thousand, four hundred twenty-four".