28857877056 has 42 divisors (see below), whose sum is σ = 82715895782. Its totient is φ = 9619292160.

The previous prime is 28857877031. The next prime is 28857877109. The reversal of 28857877056 is 65077875882.

28857877056 is a `hidden beast` number, since 2 + 8 + 8 + 578 + 7 + 7 + 0 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26516865600 + 2341011456 = 162840^2 + 48384^2 .

It is a super-2 number, since 2×28857877056² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28857876984 and 28857877002.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25049665 + ... + 25050816.

Almost surely, 2^28857877056 is an apocalyptic number.

It is an amenable number.

28857877056 is an abundant number, since it is smaller than the sum of its proper divisors (53858018726).

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

28857877056 is a wasteful number, since it uses less digits than its factorization.

28857877056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50100499 (or 50100486 counting only the distinct ones).

The product of its (nonzero) digits is 52684800, while the sum is 63.

The spelling of 28857877056 in words is "twenty-eight billion, eight hundred fifty-seven million, eight hundred seventy-seven thousand, fifty-six".