28081602 has 24 divisors (see below), whose sum is σ = 60942960. Its totient is φ = 9345240.

The previous prime is 28081591. The next prime is 28081609. The reversal of 28081602 is 20618082.

It is not an unprimeable number, because it can be changed into a prime (28081609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17577 + ... + 19107.

It is an arithmetic number, because the mean of its divisors is an integer number (2539290).

Almost surely, 2^28081602 is an apocalyptic number.

28081602 is an abundant number, since it is smaller than the sum of its proper divisors (32861358).

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

28081602 is a wasteful number, since it uses less digits than its factorization.

28081602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558 (or 2555 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 28081602 is about 5299.2076766249. The cubic root of 28081602 is about 303.9536012404.

Adding to 28081602 its reverse (20618082), we get a palindrome (48699684).

The spelling of 28081602 in words is "twenty-eight million, eighty-one thousand, six hundred two".