28211079520 has 48 divisors (see below), whose sum is σ = 71775501840. Its totient is φ = 10416397824.

The previous prime is 28211079511. The next prime is 28211079541. The reversal of 28211079520 is 2597011282.

It is a self number, because there is not a number n which added to its sum of digits gives 28211079520.

It is a congruent number.

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, 6779430 + ... + 6783589.

It is an arithmetic number, because the mean of its divisors is an integer number (1495322955).

Almost surely, 2^28211079520 is an apocalyptic number.

28211079520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28211079520 is an abundant number, since it is smaller than the sum of its proper divisors (43564422320).

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

28211079520 is a wasteful number, since it uses less digits than its factorization.

28211079520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13563047 (or 13563039 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 28211079520 in words is "twenty-eight billion, two hundred eleven million, seventy-nine thousand, five hundred twenty".