28218696 has 64 divisors (see below), whose sum is σ = 77889600. Its totient is φ = 8448000.

The previous prime is 28218637. The next prime is 28218719. The reversal of 28218696 is 69681282.

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, 22896 + ... + 24096.

It is an arithmetic number, because the mean of its divisors is an integer number (1217025).

Almost surely, 2^28218696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28218696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38944800).

28218696 is an abundant number, since it is smaller than the sum of its proper divisors (49670904).

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

28218696 is a wasteful number, since it uses less digits than its factorization.

28218696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310 (or 1306 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 28218696 is about 5312.1272575118. The cubic root of 28218696 is about 304.4474309394.

It can be divided in two parts, 282186 and 96, that added together give a palindrome (282282).

The spelling of 28218696 in words is "twenty-eight million, two hundred eighteen thousand, six hundred ninety-six".