28264444 has 24 divisors (see below), whose sum is σ = 55107360. Its totient is φ = 12594624.

The previous prime is 28264441. The next prime is 28264471. The reversal of 28264444 is 44446282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28264441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7864 + ... + 10879.

It is an arithmetic number, because the mean of its divisors is an integer number (2296140).

Almost surely, 2^28264444 is an apocalyptic number.

It is an amenable number.

28264444 is a deficient number, since it is larger than the sum of its proper divisors (26842916).

28264444 is a wasteful number, since it uses less digits than its factorization.

28264444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18789 (or 18787 counting only the distinct ones).

The product of its digits is 49152, while the sum is 34.

The square root of 28264444 is about 5316.4315099510. The cubic root of 28264444 is about 304.6118649640.

The spelling of 28264444 in words is "twenty-eight million, two hundred sixty-four thousand, four hundred forty-four".