28689067 has 4 divisors (see below), whose sum is σ = 31297176. Its totient is φ = 26080960.

The previous prime is 28688987. The next prime is 28689071. The reversal of 28689067 is 76098682.

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 28689067 - 2¹⁹ = 28164779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28689077) 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, 1304038 + ... + 1304059.

It is an arithmetic number, because the mean of its divisors is an integer number (7824294).

Almost surely, 2^28689067 is an apocalyptic number.

28689067 is a deficient number, since it is larger than the sum of its proper divisors (2608109).

28689067 is a wasteful number, since it uses less digits than its factorization.

28689067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608108.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 28689067 is about 5356.2176020024. The cubic root of 28689067 is about 306.1297063580.

It can be divided in two parts, 2868 and 9067, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 28689067 in words is "twenty-eight million, six hundred eighty-nine thousand, sixty-seven".