28278263002004 has 12 divisors (see below), whose sum is σ = 52397957915604. Its totient is φ = 13307417883264.

The previous prime is 28278263001983. The next prime is 28278263002081. The reversal of 28278263002004 is 40020036287282.

It can be written as a sum of positive squares in 2 ways, for example, as 10358111433604 + 17920151568400 = 3218402^2 + 4233220^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207928404359 + ... + 207928404494.

It is an arithmetic number, because the mean of its divisors is an integer number (4366496492967).

Almost surely, 2^{28278263002004} is an apocalyptic number.

It is an amenable number.

28278263002004 is a deficient number, since it is larger than the sum of its proper divisors (24119694913600).

28278263002004 is a wasteful number, since it uses less digits than its factorization.

28278263002004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415856808874 (or 415856808872 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 44.

Adding to 28278263002004 its reverse (40020036287282), we get a palindrome (68298299289286).

The spelling of 28278263002004 in words is "twenty-eight trillion, two hundred seventy-eight billion, two hundred sixty-three million, two thousand, four".