28766943 has 12 divisors (see below), whose sum is σ = 41603328. Its totient is φ = 19154400.

The previous prime is 28766923. The next prime is 28766963. The reversal of 28766943 is 34966782.

It is an interprime number because it is at equal distance from previous prime (28766923) and next prime (28766963).

It is not a de Polignac number, because 28766943 - 2²⁰ = 27718367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28766923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8971 + ... + 11747.

It is an arithmetic number, because the mean of its divisors is an integer number (3466944).

Almost surely, 2^28766943 is an apocalyptic number.

28766943 is a deficient number, since it is larger than the sum of its proper divisors (12836385).

28766943 is a wasteful number, since it uses less digits than its factorization.

28766943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934 (or 3931 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 28766943 is about 5363.4823575733. The cubic root of 28766943 is about 306.4064507853.

The spelling of 28766943 in words is "twenty-eight million, seven hundred sixty-six thousand, nine hundred forty-three".