28109373 has 8 divisors (see below), whose sum is σ = 37648128. Its totient is φ = 18655104.

The previous prime is 28109369. The next prime is 28109383. The reversal of 28109373 is 37390182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28109373 - 2² = 28109369 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28109363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20340 + ... + 21677.

It is an arithmetic number, because the mean of its divisors is an integer number (4706016).

Almost surely, 2^28109373 is an apocalyptic number.

It is an amenable number.

28109373 is a deficient number, since it is larger than the sum of its proper divisors (9538755).

28109373 is a wasteful number, since it uses less digits than its factorization.

28109373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42243.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 28109373 is about 5301.8273264979. The cubic root of 28109373 is about 304.0537654501.

It can be divided in two parts, 28109 and 373, that added together give a palindrome (28482).

The spelling of 28109373 in words is "twenty-eight million, one hundred nine thousand, three hundred seventy-three".