28743894467 has 16 divisors (see below), whose sum is σ = 29502109248. Its totient is φ = 27997747200.

The previous prime is 28743894437. The next prime is 28743894503. The reversal of 28743894467 is 76449834782.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28743894467 - 2⁸ = 28743894211 is a prime.

It is a super-2 number, since 2×28743894467² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28743894427) 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, 1899443 + ... + 1914515.

It is an arithmetic number, because the mean of its divisors is an integer number (1843881828).

Almost surely, 2^28743894467 is an apocalyptic number.

28743894467 is a deficient number, since it is larger than the sum of its proper divisors (758214781).

28743894467 is a wasteful number, since it uses less digits than its factorization.

28743894467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15470.

The product of its digits is 65028096, while the sum is 62.

The spelling of 28743894467 in words is "twenty-eight billion, seven hundred forty-three million, eight hundred ninety-four thousand, four hundred sixty-seven".