28503646322 has 18 divisors (see below), whose sum is σ = 44190643887. Its totient is φ = 13788505500.

The previous prime is 28503646289. The next prime is 28503646337. The reversal of 28503646322 is 22364630582.

It can be written as a sum of positive squares in only one way, i.e., 14251823161 + 14251823161 = 119381^2 + 119381^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=119381.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28503646322.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7399697 + ... + 7403547.

Almost surely, 2^28503646322 is an apocalyptic number.

28503646322 is a deficient number, since it is larger than the sum of its proper divisors (15686997565).

28503646322 is an frugal number, since it uses more digits than its factorization.

28503646322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7766 (or 3884 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 28503646322 in words is "twenty-eight billion, five hundred three million, six hundred forty-six thousand, three hundred twenty-two".