28321167 has 32 divisors (see below), whose sum is σ = 46656000. Its totient is φ = 15222144.

The previous prime is 28321159. The next prime is 28321171. The reversal of 28321167 is 76112382.

It is not a de Polignac number, because 28321167 - 2³ = 28321159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28321367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16684 + ... + 18302.

It is an arithmetic number, because the mean of its divisors is an integer number (1458000).

Almost surely, 2^28321167 is an apocalyptic number.

28321167 is a deficient number, since it is larger than the sum of its proper divisors (18334833).

28321167 is a wasteful number, since it uses less digits than its factorization.

28321167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660 (or 1646 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 28321167 is about 5321.7635234948. The cubic root of 28321167 is about 304.8155007066.

The spelling of 28321167 in words is "twenty-eight million, three hundred twenty-one thousand, one hundred sixty-seven".