28957784724 has 36 divisors (see below), whose sum is σ = 79853286240. Its totient is φ = 8775086160.

The previous prime is 28957784629. The next prime is 28957784761. The reversal of 28957784724 is 42748775982.

28957784724 is a `hidden beast` number, since 2 + 8 + 95 + 7 + 78 + 472 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×28957784724² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36562464 + ... + 36563255.

It is an arithmetic number, because the mean of its divisors is an integer number (2218146840).

Almost surely, 2^28957784724 is an apocalyptic number.

It is an amenable number.

28957784724 is an abundant number, since it is smaller than the sum of its proper divisors (50895501516).

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

28957784724 is a wasteful number, since it uses less digits than its factorization.

28957784724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73125740 (or 73125735 counting only the distinct ones).

The product of its digits is 63221760, while the sum is 63.

The spelling of 28957784724 in words is "twenty-eight billion, nine hundred fifty-seven million, seven hundred eighty-four thousand, seven hundred twenty-four".