28018614 has 32 divisors (see below), whose sum is σ = 61125120. Its totient is φ = 8510112.

The previous prime is 28018607. The next prime is 28018633. The reversal of 28018614 is 41681082.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3889 + ... + 8435.

It is an arithmetic number, because the mean of its divisors is an integer number (1910160).

Almost surely, 2^28018614 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28018614, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30562560).

28018614 is an abundant number, since it is smaller than the sum of its proper divisors (33106506).

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

28018614 is a wasteful number, since it uses less digits than its factorization.

28018614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28018614 is about 5293.2611875856. The cubic root of 28018614 is about 303.7261716477.

Adding to 28018614 its reverse (41681082), we get a palindrome (69699696).

The spelling of 28018614 in words is "twenty-eight million, eighteen thousand, six hundred fourteen".