28076043987 has 20 divisors (see below), whose sum is σ = 42732098640. Its totient is φ = 18364202064.

The previous prime is 28076043979. The next prime is 28076043991. The reversal of 28076043987 is 78934067082.

28076043987 is a `hidden beast` number, since 28 + 0 + 7 + 604 + 3 + 9 + 8 + 7 = 666.

It is not a de Polignac number, because 28076043987 - 2³ = 28076043979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28076043917) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3265687 + ... + 3274272.

It is an arithmetic number, because the mean of its divisors is an integer number (2136604932).

Almost surely, 2^28076043987 is an apocalyptic number.

28076043987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28076043987 is a deficient number, since it is larger than the sum of its proper divisors (14656054653).

28076043987 is an equidigital number, since it uses as much as digits as its factorization.

28076043987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6540024 (or 6540015 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 28076043987 in words is "twenty-eight billion, seventy-six million, forty-three thousand, nine hundred eighty-seven".