28790067 has 4 divisors (see below), whose sum is σ = 38386760. Its totient is φ = 19193376.

The previous prime is 28790051. The next prime is 28790071. The reversal of 28790067 is 76009782.

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

It is not a de Polignac number, because 28790067 - 2⁴ = 28790051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28790017) 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, 4798342 + ... + 4798347.

It is an arithmetic number, because the mean of its divisors is an integer number (9596690).

Almost surely, 2^28790067 is an apocalyptic number.

28790067 is a deficient number, since it is larger than the sum of its proper divisors (9596693).

28790067 is an equidigital number, since it uses as much as digits as its factorization.

28790067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9596692.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 28790067 is about 5365.6376135554. The cubic root of 28790067 is about 306.4885293146.

The spelling of 28790067 in words is "twenty-eight million, seven hundred ninety thousand, sixty-seven".