28087764031007 has 4 divisors (see below), whose sum is σ = 29566067401080. Its totient is φ = 26609460660936.

The previous prime is 28087764030947. The next prime is 28087764031097. The reversal of 28087764031007 is 70013046778082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28087764031007 - 2¹⁴ = 28087764014623 is a prime.

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 28087764031007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28087764031097) 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 3 ways as a sum of consecutive naturals, for example, 739151685008 + ... + 739151685045.

It is an arithmetic number, because the mean of its divisors is an integer number (7391516850270).

Almost surely, 2^{28087764031007} is an apocalyptic number.

28087764031007 is a deficient number, since it is larger than the sum of its proper divisors (1478303370073).

28087764031007 is a wasteful number, since it uses less digits than its factorization.

28087764031007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478303370072.

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

The spelling of 28087764031007 in words is "twenty-eight trillion, eighty-seven billion, seven hundred sixty-four million, thirty-one thousand, seven".