28078766027 has 16 divisors (see below), whose sum is σ = 30430552320. Its totient is φ = 25754827392.

The previous prime is 28078766021. The next prime is 28078766039. The reversal of 28078766027 is 72066787082.

It is a cyclic number.

It is not a de Polignac number, because 28078766027 - 2⁴ = 28078766011 is a prime.

It is a super-3 number, since 3×28078766027³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28078766027.

It is not an unprimeable number, because it can be changed into a prime (28078766021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1606049 + ... + 1623437.

It is an arithmetic number, because the mean of its divisors is an integer number (1901909520).

Almost surely, 2^28078766027 is an apocalyptic number.

28078766027 is a deficient number, since it is larger than the sum of its proper divisors (2351786293).

28078766027 is a wasteful number, since it uses less digits than its factorization.

28078766027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18182.

The product of its (nonzero) digits is 3161088, while the sum is 53.

The spelling of 28078766027 in words is "twenty-eight billion, seventy-eight million, seven hundred sixty-six thousand, twenty-seven".