28980077643 has 16 divisors (see below), whose sum is σ = 46836489600. Its totient is φ = 17563683240.

The previous prime is 28980077593. The next prime is 28980077647. The reversal of 28980077643 is 34677008982.

It is not a de Polignac number, because 28980077643 - 2⁸ = 28980077387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28980077643.

It is not an unprimeable number, because it can be changed into a prime (28980077647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48787713 + ... + 48788306.

It is an arithmetic number, because the mean of its divisors is an integer number (2927280600).

Almost surely, 2^28980077643 is an apocalyptic number.

28980077643 is a deficient number, since it is larger than the sum of its proper divisors (17856411957).

28980077643 is a wasteful number, since it uses less digits than its factorization.

28980077643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97576039 (or 97576033 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 28980077643 in words is "twenty-eight billion, nine hundred eighty million, seventy-seven thousand, six hundred forty-three".