28741887568 has 20 divisors (see below), whose sum is σ = 57045637908. Its totient is φ = 14020432640.

The previous prime is 28741887547. The next prime is 28741887611. The reversal of 28741887568 is 86578814782.

It can be written as a sum of positive squares in 2 ways, for example, as 1321177104 + 27420710464 = 36348^2 + 165592^2 .

It is a super-2 number, since 2×28741887568² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21906271 + ... + 21907582.

Almost surely, 2^28741887568 is an apocalyptic number.

It is an amenable number.

28741887568 is a deficient number, since it is larger than the sum of its proper divisors (28303750340).

28741887568 is a wasteful number, since it uses less digits than its factorization.

28741887568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43813902 (or 43813896 counting only the distinct ones).

The product of its digits is 48168960, while the sum is 64.

The spelling of 28741887568 in words is "twenty-eight billion, seven hundred forty-one million, eight hundred eighty-seven thousand, five hundred sixty-eight".