28866826641247 has 16 divisors (see below), whose sum is σ = 33164180324352. Its totient is φ = 24612859500480.

The previous prime is 28866826641241. The next prime is 28866826641253. The reversal of 28866826641247 is 74214662866882.

It is an interprime number because it is at equal distance from previous prime (28866826641241) and next prime (28866826641253).

It is a cyclic number.

It is not a de Polignac number, because 28866826641247 - 2¹⁵ = 28866826608479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28866826641241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60914338 + ... + 61386400.

It is an arithmetic number, because the mean of its divisors is an integer number (2072761270272).

Almost surely, 2^{28866826641247} is an apocalyptic number.

28866826641247 is a deficient number, since it is larger than the sum of its proper divisors (4297353683105).

28866826641247 is a wasteful number, since it uses less digits than its factorization.

28866826641247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517998.

The product of its digits is 594542592, while the sum is 70.

The spelling of 28866826641247 in words is "twenty-eight trillion, eight hundred sixty-six billion, eight hundred twenty-six million, six hundred forty-one thousand, two hundred forty-seven".