28812778467 has 16 divisors (see below), whose sum is σ = 41914488960. Its totient is φ = 17460209600.

The previous prime is 28812778429. The next prime is 28812778469. The reversal of 28812778467 is 76487721882.

It is a cyclic number.

It is not a de Polignac number, because 28812778467 - 2⁶ = 28812778403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28812778467.

It is not an unprimeable number, because it can be changed into a prime (28812778469) 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, 256492 + ... + 351302.

It is an arithmetic number, because the mean of its divisors is an integer number (2619655560).

Almost surely, 2^28812778467 is an apocalyptic number.

28812778467 is a deficient number, since it is larger than the sum of its proper divisors (13101710493).

28812778467 is a wasteful number, since it uses less digits than its factorization.

28812778467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104034.

The product of its digits is 16859136, while the sum is 60.

The spelling of 28812778467 in words is "twenty-eight billion, eight hundred twelve million, seven hundred seventy-eight thousand, four hundred sixty-seven".