28561382 has 16 divisors (see below), whose sum is σ = 43891632. Its totient is φ = 13933920.

The previous prime is 28561327. The next prime is 28561387. The reversal of 28561382 is 28316582.

28561382 is nontrivially palindromic in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28561387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21728 + ... + 23004.

It is an arithmetic number, because the mean of its divisors is an integer number (2743227).

Almost surely, 2^28561382 is an apocalyptic number.

28561382 is a deficient number, since it is larger than the sum of its proper divisors (15330250).

28561382 is a wasteful number, since it uses less digits than its factorization.

28561382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543.

The product of its digits is 23040, while the sum is 35.

The square root of 28561382 is about 5344.2849849161. The cubic root of 28561382 is about 305.6748721800.

The spelling of 28561382 in words is "twenty-eight million, five hundred sixty-one thousand, three hundred eighty-two".