28718164 has 12 divisors (see below), whose sum is σ = 50822100. Its totient is φ = 14197568.

The previous prime is 28718161. The next prime is 28718167. The reversal of 28718164 is 46181782.

It is an interprime number because it is at equal distance from previous prime (28718161) and next prime (28718167).

It can be written as a sum of positive squares in 2 ways, for example, as 5098564 + 23619600 = 2258^2 + 4860^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28718161) 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, 39979 + ... + 40690.

It is an arithmetic number, because the mean of its divisors is an integer number (4235175).

Almost surely, 2^28718164 is an apocalyptic number.

It is an amenable number.

28718164 is a deficient number, since it is larger than the sum of its proper divisors (22103936).

28718164 is a wasteful number, since it uses less digits than its factorization.

28718164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80762 (or 80760 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 28718164 is about 5358.9331027733. The cubic root of 28718164 is about 306.2331655886.

It can be divided in two parts, 28718 and 164, that added together give a palindrome (28882).

The spelling of 28718164 in words is "twenty-eight million, seven hundred eighteen thousand, one hundred sixty-four".