28544041968 has 80 divisors (see below), whose sum is σ = 79509140256. Its totient is φ = 8771927040.

The previous prime is 28544041951. The next prime is 28544041979. The reversal of 28544041968 is 86914044582.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28544041968.

It is a congruent number.

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, 484446 + ... + 540162.

Almost surely, 2^28544041968 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 28544041968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39754570128).

28544041968 is an abundant number, since it is smaller than the sum of its proper divisors (50965098288).

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

28544041968 is a wasteful number, since it uses less digits than its factorization.

28544041968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56562 (or 56556 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 51.

The spelling of 28544041968 in words is "twenty-eight billion, five hundred forty-four million, forty-one thousand, nine hundred sixty-eight".