28353644 has 12 divisors (see below), whose sum is σ = 54129768. Its totient is φ = 12888000.

The previous prime is 28353631. The next prime is 28353649. The reversal of 28353644 is 44635382.

It is not an unprimeable number, because it can be changed into a prime (28353649) 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 in 3 ways as a sum of consecutive naturals, for example, 322157 + ... + 322244.

It is an arithmetic number, because the mean of its divisors is an integer number (4510814).

Almost surely, 2^28353644 is an apocalyptic number.

It is an amenable number.

28353644 is a deficient number, since it is larger than the sum of its proper divisors (25776124).

28353644 is a wasteful number, since it uses less digits than its factorization.

28353644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644416 (or 644414 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 28353644 is about 5324.8139873614. The cubic root of 28353644 is about 304.9319708527.

The spelling of 28353644 in words is "twenty-eight million, three hundred fifty-three thousand, six hundred forty-four".