28183645 has 16 divisors (see below), whose sum is σ = 39144960. Its totient is φ = 19079424.

The previous prime is 28183633. The next prime is 28183699. The reversal of 28183645 is 54638182.

It is a happy number.

It is not a de Polignac number, because 28183645 - 2¹⁵ = 28150877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2332 + ... + 7861.

It is an arithmetic number, because the mean of its divisors is an integer number (2446560).

Almost surely, 2^28183645 is an apocalyptic number.

It is an amenable number.

28183645 is a deficient number, since it is larger than the sum of its proper divisors (10961315).

28183645 is a wasteful number, since it uses less digits than its factorization.

28183645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10284.

The product of its digits is 46080, while the sum is 37.

The square root of 28183645 is about 5308.8270832642. The cubic root of 28183645 is about 304.3213253219.

The spelling of 28183645 in words is "twenty-eight million, one hundred eighty-three thousand, six hundred forty-five".