28023802 has 12 divisors (see below), whose sum is σ = 43537806. Its totient is φ = 13527920.

The previous prime is 28023799. The next prime is 28023811. The reversal of 28023802 is 20832082.

It can be written as a sum of positive squares in 3 ways, for example, as 24295041 + 3728761 = 4929^2 + 1931^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6649 + ... + 10012.

Almost surely, 2^28023802 is an apocalyptic number.

28023802 is a deficient number, since it is larger than the sum of its proper divisors (15514004).

28023802 is a wasteful number, since it uses less digits than its factorization.

28023802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16721 (or 16692 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 28023802 is about 5293.7512219597. The cubic root of 28023802 is about 303.7449167354.

Adding to 28023802 its reverse (20832082), we get a palindrome (48855884).

The spelling of 28023802 in words is "twenty-eight million, twenty-three thousand, eight hundred two".