28032767 has 4 divisors (see below), whose sum is σ = 32037456. Its totient is φ = 24028080.

The previous prime is 28032761. The next prime is 28032769. The reversal of 28032767 is 76723082.

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 28032767 - 2⁴ = 28032751 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28032761) 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, 2002334 + ... + 2002347.

It is an arithmetic number, because the mean of its divisors is an integer number (8009364).

Almost surely, 2^28032767 is an apocalyptic number.

28032767 is a deficient number, since it is larger than the sum of its proper divisors (4004689).

28032767 is an equidigital number, since it uses as much as digits as its factorization.

28032767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004688.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 28032767 is about 5294.5979073014. The cubic root of 28032767 is about 303.7773032861. Note that the first 3 decimals are identical.

The spelling of 28032767 in words is "twenty-eight million, thirty-two thousand, seven hundred sixty-seven".