28132818 has 32 divisors (see below), whose sum is σ = 67101696. Its totient is φ = 7688208.

The previous prime is 28132801. The next prime is 28132859. The reversal of 28132818 is 81823182.

It is a super-2 number, since 2×28132818² = 1582910897242248, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13596 + ... + 15527.

It is an arithmetic number, because the mean of its divisors is an integer number (2096928).

Almost surely, 2^28132818 is an apocalyptic number.

28132818 is an abundant number, since it is smaller than the sum of its proper divisors (38968878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28132818 is a wasteful number, since it uses less digits than its factorization.

28132818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29158.

The product of its digits is 6144, while the sum is 33.

The square root of 28132818 is about 5304.0378957922. The cubic root of 28132818 is about 304.1382753342.

The spelling of 28132818 in words is "twenty-eight million, one hundred thirty-two thousand, eight hundred eighteen".