28857777208 has 16 divisors (see below), whose sum is σ = 58270511880. Its totient is φ = 13318974048.

The previous prime is 28857777131. The next prime is 28857777211. The reversal of 28857777208 is 80277775882.

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 3 ways as a sum of consecutive naturals, for example, 138739210 + ... + 138739417.

Almost surely, 2^28857777208 is an apocalyptic number.

It is an amenable number.

28857777208 is an abundant number, since it is smaller than the sum of its proper divisors (29412734672).

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

28857777208 is a wasteful number, since it uses less digits than its factorization.

28857777208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277478646 (or 277478642 counting only the distinct ones).

The product of its (nonzero) digits is 24586240, while the sum is 61.

The spelling of 28857777208 in words is "twenty-eight billion, eight hundred fifty-seven million, seven hundred seventy-seven thousand, two hundred eight".