28328252787 has 48 divisors (see below), whose sum is σ = 47178612000. Its totient is φ = 16258378752.

The previous prime is 28328252783. The next prime is 28328252789. The reversal of 28328252787 is 78725282382.

28328252787 is a `hidden beast` number, since 2 + 8 + 32 + 8 + 2 + 527 + 87 = 666.

It is not a de Polignac number, because 28328252787 - 2² = 28328252783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28328252783) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83712 + ... + 252317.

It is an arithmetic number, because the mean of its divisors is an integer number (982887750).

Almost surely, 2^28328252787 is an apocalyptic number.

28328252787 is a deficient number, since it is larger than the sum of its proper divisors (18850359213).

28328252787 is a wasteful number, since it uses less digits than its factorization.

28328252787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336100 (or 336097 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 54.

The spelling of 28328252787 in words is "twenty-eight billion, three hundred twenty-eight million, two hundred fifty-two thousand, seven hundred eighty-seven".