28814818 has 8 divisors (see below), whose sum is σ = 43708140. Its totient is φ = 14245440.

The previous prime is 28814809. The next prime is 28814827. The reversal of 28814818 is 81841882.

It is an interprime number because it is at equal distance from previous prime (28814809) and next prime (28814827).

It can be written as a sum of positive squares in 2 ways, for example, as 20766249 + 8048569 = 4557^2 + 2837^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80763 + ... + 81118.

Almost surely, 2^28814818 is an apocalyptic number.

28814818 is a deficient number, since it is larger than the sum of its proper divisors (14893322).

28814818 is a wasteful number, since it uses less digits than its factorization.

28814818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161972.

The product of its digits is 32768, while the sum is 40.

The square root of 28814818 is about 5367.9435540997. The cubic root of 28814818 is about 306.5763341901.

The spelling of 28814818 in words is "twenty-eight million, eight hundred fourteen thousand, eight hundred eighteen".