28663144 has 16 divisors (see below), whose sum is σ = 54655200. Its totient is φ = 14088432.

The previous prime is 28663121. The next prime is 28663157. The reversal of 28663144 is 44136682.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29892 + ... + 30835.

It is an arithmetic number, because the mean of its divisors is an integer number (3415950).

Almost surely, 2^28663144 is an apocalyptic number.

It is an amenable number.

28663144 is a deficient number, since it is larger than the sum of its proper divisors (25992056).

28663144 is a wasteful number, since it uses less digits than its factorization.

28663144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60792 (or 60788 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 28663144 is about 5353.7971571586. The cubic root of 28663144 is about 306.0374738733.

The spelling of 28663144 in words is "twenty-eight million, six hundred sixty-three thousand, one hundred forty-four".