28634224 has 20 divisors (see below), whose sum is σ = 55855800. Its totient is φ = 14219840.

The previous prime is 28634219. The next prime is 28634251. The reversal of 28634224 is 42243682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3622 + ... + 8389.

It is an arithmetic number, because the mean of its divisors is an integer number (2792790).

Almost surely, 2^28634224 is an apocalyptic number.

It is an amenable number.

28634224 is a deficient number, since it is larger than the sum of its proper divisors (27221576).

28634224 is a wasteful number, since it uses less digits than its factorization.

28634224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12168 (or 12162 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The square root of 28634224 is about 5351.0955887556. The cubic root of 28634224 is about 305.9345125925.

The spelling of 28634224 in words is "twenty-eight million, six hundred thirty-four thousand, two hundred twenty-four".