28767994902211 has 4 divisors (see below), whose sum is σ = 28782300222424. Its totient is φ = 28753689582000.

The previous prime is 28767994902197. The next prime is 28767994902247. The reversal of 28767994902211 is 11220949976782.

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 28767994902211 - 2⁹ = 28767994901699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28767994902271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7152657090 + ... + 7152661111.

It is an arithmetic number, because the mean of its divisors is an integer number (7195575055606).

Almost surely, 2^{28767994902211} is an apocalyptic number.

28767994902211 is a deficient number, since it is larger than the sum of its proper divisors (14305320213).

28767994902211 is a wasteful number, since it uses less digits than its factorization.

28767994902211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14305320212.

The product of its (nonzero) digits is 54867456, while the sum is 67.

The spelling of 28767994902211 in words is "twenty-eight trillion, seven hundred sixty-seven billion, nine hundred ninety-four million, nine hundred two thousand, two hundred eleven".