28057728316 has 12 divisors (see below), whose sum is σ = 49198644432. Its totient is φ = 14000972768.

The previous prime is 28057728289. The next prime is 28057728329. The reversal of 28057728316 is 61382775082.

It is a super-2 number, since 2×28057728316² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28057728316.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6970585 + ... + 6974608.

It is an arithmetic number, because the mean of its divisors is an integer number (4099887036).

Almost surely, 2^28057728316 is an apocalyptic number.

It is an amenable number.

28057728316 is a deficient number, since it is larger than the sum of its proper divisors (21140916116).

28057728316 is a wasteful number, since it uses less digits than its factorization.

28057728316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13945700 (or 13945698 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 28057728316 in words is "twenty-eight billion, fifty-seven million, seven hundred twenty-eight thousand, three hundred sixteen".