28408424286224 has 80 divisors (see below), whose sum is σ = 57039720504000. Its totient is φ = 13690243607040.

The previous prime is 28408424286167. The next prime is 28408424286227. The reversal of 28408424286224 is 42268242480482.

It is a super-2 number, since 2×28408424286224² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28408424286224.

It is not an unprimeable number, because it can be changed into a prime (28408424286227) 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, 693900347 + ... + 693941285.

It is an arithmetic number, because the mean of its divisors is an integer number (712996506300).

Almost surely, 2^{28408424286224} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28408424286224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28519860252000).

28408424286224 is an abundant number, since it is smaller than the sum of its proper divisors (28631296217776).

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

28408424286224 is a wasteful number, since it uses less digits than its factorization.

28408424286224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43576 (or 43570 counting only the distinct ones).

The product of its (nonzero) digits is 25165824, while the sum is 56.

The spelling of 28408424286224 in words is "twenty-eight trillion, four hundred eight billion, four hundred twenty-four million, two hundred eighty-six thousand, two hundred twenty-four".