28304067 has 16 divisors (see below), whose sum is σ = 41948928. Its totient is φ = 16829280.

The previous prime is 28304057. The next prime is 28304077. The reversal of 28304067 is 76040382.

It is an interprime number because it is at equal distance from previous prime (28304057) and next prime (28304077).

It is not a de Polignac number, because 28304067 - 2¹¹ = 28302019 is a prime.

It is a super-2 number, since 2×28304067² = 1602240417480978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28304057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6343 + ... + 9840.

It is an arithmetic number, because the mean of its divisors is an integer number (2621808).

Almost surely, 2^28304067 is an apocalyptic number.

28304067 is a deficient number, since it is larger than the sum of its proper divisors (13644861).

28304067 is a wasteful number, since it uses less digits than its factorization.

28304067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16250.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 28304067 is about 5320.1566706254. The cubic root of 28304067 is about 304.7541403059.

The spelling of 28304067 in words is "twenty-eight million, three hundred four thousand, sixty-seven".