28263616 has 14 divisors (see below), whose sum is σ = 56085740. Its totient is φ = 14131776.

The previous prime is 28263601. The next prime is 28263617. The reversal of 28263616 is 61636282.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28263617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220746 + ... + 220873.

Almost surely, 2^28263616 is an apocalyptic number.

It is an amenable number.

28263616 is a deficient number, since it is larger than the sum of its proper divisors (27822124).

28263616 is an equidigital number, since it uses as much as digits as its factorization.

28263616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441631 (or 441621 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 28263616 is about 5316.3536375979. The cubic root of 28263616 is about 304.6088904248.

Adding to 28263616 its reverse (61636282), we get a palindrome (89899898).

The spelling of 28263616 in words is "twenty-eight million, two hundred sixty-three thousand, six hundred sixteen".