28967851 has 4 divisors (see below), whose sum is σ = 31601304. Its totient is φ = 26334400.

The previous prime is 28967831. The next prime is 28967891. The reversal of 28967851 is 15876982.

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 28967851 - 2⁵ = 28967819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28967801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316710 + ... + 1316731.

It is an arithmetic number, because the mean of its divisors is an integer number (7900326).

Almost surely, 2^28967851 is an apocalyptic number.

28967851 is a deficient number, since it is larger than the sum of its proper divisors (2633453).

28967851 is a wasteful number, since it uses less digits than its factorization.

28967851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2633452.

The product of its digits is 241920, while the sum is 46.

The square root of 28967851 is about 5382.1790196908. The cubic root of 28967851 is about 307.1181096546.

The spelling of 28967851 in words is "twenty-eight million, nine hundred sixty-seven thousand, eight hundred fifty-one".