28764167 has 4 divisors (see below), whose sum is σ = 28910376. Its totient is φ = 28617960.

The previous prime is 28764163. The next prime is 28764193. The reversal of 28764167 is 76146782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76146782 = 2 ⋅38073391.

It is a cyclic number.

It is not a de Polignac number, because 28764167 - 2² = 28764163 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 (28764161) 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, 72809 + ... + 73202.

It is an arithmetic number, because the mean of its divisors is an integer number (7227594).

Almost surely, 2^28764167 is an apocalyptic number.

28764167 is a deficient number, since it is larger than the sum of its proper divisors (146209).

28764167 is a wasteful number, since it uses less digits than its factorization.

28764167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146208.

The product of its digits is 112896, while the sum is 41.

The square root of 28764167 is about 5363.2235642382. The cubic root of 28764167 is about 306.3965944296.

The spelling of 28764167 in words is "twenty-eight million, seven hundred sixty-four thousand, one hundred sixty-seven".