28026667 has 4 divisors (see below), whose sum is σ = 28055776. Its totient is φ = 27997560.

The previous prime is 28026643. The next prime is 28026679. The reversal of 28026667 is 76662082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28026667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28026967) 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, 13059 + ... + 15052.

It is an arithmetic number, because the mean of its divisors is an integer number (7013944).

Almost surely, 2^28026667 is an apocalyptic number.

28026667 is a deficient number, since it is larger than the sum of its proper divisors (29109).

28026667 is an equidigital number, since it uses as much as digits as its factorization.

28026667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29108.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 28026667 is about 5294.0218171065. The cubic root of 28026667 is about 303.7552674548.

The spelling of 28026667 in words is "twenty-eight million, twenty-six thousand, six hundred sixty-seven".