28317944 has 8 divisors (see below), whose sum is σ = 53096160. Its totient is φ = 14158968.

The previous prime is 28317943. The next prime is 28317967. The reversal of 28317944 is 44971382.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 28317898 and 28317907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28317943) 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 as a sum of consecutive naturals, namely, 1769864 + ... + 1769879.

It is an arithmetic number, because the mean of its divisors is an integer number (6637020).

Almost surely, 2^28317944 is an apocalyptic number.

It is an amenable number.

28317944 is a deficient number, since it is larger than the sum of its proper divisors (24778216).

28317944 is a wasteful number, since it uses less digits than its factorization.

28317944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539749 (or 3539745 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 28317944 is about 5321.4607017247. The cubic root of 28317944 is about 304.8039374163.

The spelling of 28317944 in words is "twenty-eight million, three hundred seventeen thousand, nine hundred forty-four".