28540756057 has 12 divisors (see below), whose sum is σ = 31675833280. Its totient is φ = 25694226360.

The previous prime is 28540756033. The next prime is 28540756093. The reversal of 28540756057 is 75065704582.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-28540756057 is a prime.

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 28540756057.

It is not an unprimeable number, because it can be changed into a prime (28540757057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1132557 + ... + 1157482.

Almost surely, 2^28540756057 is an apocalyptic number.

It is an amenable number.

28540756057 is a deficient number, since it is larger than the sum of its proper divisors (3135077223).

28540756057 is a wasteful number, since it uses less digits than its factorization.

28540756057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290164 (or 2290153 counting only the distinct ones).

The product of its (nonzero) digits is 2352000, while the sum is 49.

The spelling of 28540756057 in words is "twenty-eight billion, five hundred forty million, seven hundred fifty-six thousand, fifty-seven".