28717392424 has 64 divisors (see below), whose sum is σ = 62533094400. Its totient is φ = 12109768704.

The previous prime is 28717392391. The next prime is 28717392461. The reversal of 28717392424 is 42429371782.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924457 + ... + 955015.

It is an arithmetic number, because the mean of its divisors is an integer number (977079600).

Almost surely, 2^28717392424 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 28717392424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31266547200).

28717392424 is an abundant number, since it is smaller than the sum of its proper divisors (33815701976).

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

28717392424 is a wasteful number, since it uses less digits than its factorization.

28717392424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30842 (or 30838 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 49.

The spelling of 28717392424 in words is "twenty-eight billion, seven hundred seventeen million, three hundred ninety-two thousand, four hundred twenty-four".