28967117 has 4 divisors (see below), whose sum is σ = 28982940. Its totient is φ = 28951296.

The previous prime is 28967111. The next prime is 28967119. The reversal of 28967117 is 71176982.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9554281 + 19412836 = 3091^2 + 4406^2 .

It is a cyclic number.

It is not a de Polignac number, because 28967117 - 2⁴ = 28967101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28967111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4742 + ... + 8967.

It is an arithmetic number, because the mean of its divisors is an integer number (7245735).

Almost surely, 2^28967117 is an apocalyptic number.

It is an amenable number.

28967117 is a deficient number, since it is larger than the sum of its proper divisors (15823).

28967117 is a wasteful number, since it uses less digits than its factorization.

28967117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15822.

The product of its digits is 42336, while the sum is 41.

The square root of 28967117 is about 5382.1108312631. The cubic root of 28967117 is about 307.1155156686.

The spelling of 28967117 in words is "twenty-eight million, nine hundred sixty-seven thousand, one hundred seventeen".