28965967 has 4 divisors (see below), whose sum is σ = 29672496. Its totient is φ = 28259440.

The previous prime is 28965949. The next prime is 28966009. The reversal of 28965967 is 76956982.

It is a happy number.

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 28965967 - 2¹¹ = 28963919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28965917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353203 + ... + 353284.

It is an arithmetic number, because the mean of its divisors is an integer number (7418124).

Almost surely, 2^28965967 is an apocalyptic number.

28965967 is a deficient number, since it is larger than the sum of its proper divisors (706529).

28965967 is an equidigital number, since it uses as much as digits as its factorization.

28965967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706528.

The product of its digits is 1632960, while the sum is 52.

The square root of 28965967 is about 5382.0039947960. The cubic root of 28965967 is about 307.1114514336. Note that the first 3 decimals are identical.

The spelling of 28965967 in words is "twenty-eight million, nine hundred sixty-five thousand, nine hundred sixty-seven".