28871144 has 16 divisors (see below), whose sum is σ = 54301920. Its totient is φ = 14390640.

The previous prime is 28871131. The next prime is 28871159. The reversal of 28871144 is 44117882.

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, 2804 + ... + 8099.

It is an arithmetic number, because the mean of its divisors is an integer number (3393870).

Almost surely, 2^28871144 is an apocalyptic number.

It is an amenable number.

28871144 is a deficient number, since it is larger than the sum of its proper divisors (25430776).

28871144 is a wasteful number, since it uses less digits than its factorization.

28871144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11240 (or 11236 counting only the distinct ones).

The product of its digits is 14336, while the sum is 35.

The square root of 28871144 is about 5373.1875083604. The cubic root of 28871144 is about 306.7759650314.

The spelling of 28871144 in words is "twenty-eight million, eight hundred seventy-one thousand, one hundred forty-four".