28672144 has 20 divisors (see below), whose sum is σ = 55639296. Its totient is φ = 14313632.

The previous prime is 28672141. The next prime is 28672169. The reversal of 28672144 is 44127682.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28672141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14817 + ... + 16639.

Almost surely, 2^28672144 is an apocalyptic number.

It is an amenable number.

28672144 is a deficient number, since it is larger than the sum of its proper divisors (26967152).

28672144 is a wasteful number, since it uses less digits than its factorization.

28672144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814 (or 2808 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 28672144 is about 5354.6376161231. The cubic root of 28672144 is about 306.0695016350.

The spelling of 28672144 in words is "twenty-eight million, six hundred seventy-two thousand, one hundred forty-four".