28045373 has 4 divisors (see below), whose sum is σ = 28302780. Its totient is φ = 27787968.

The previous prime is 28045361. The next prime is 28045379. The reversal of 28045373 is 37354082.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14303524 + 13741849 = 3782^2 + 3707^2 .

It is a cyclic number.

It is not a de Polignac number, because 28045373 - 2¹⁸ = 27783229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28045379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128540 + ... + 128757.

It is an arithmetic number, because the mean of its divisors is an integer number (7075695).

Almost surely, 2^28045373 is an apocalyptic number.

It is an amenable number.

28045373 is a deficient number, since it is larger than the sum of its proper divisors (257407).

28045373 is a wasteful number, since it uses less digits than its factorization.

28045373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257406.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 28045373 is about 5295.7882321709. The cubic root of 28045373 is about 303.8228314689.

The spelling of 28045373 in words is "twenty-eight million, forty-five thousand, three hundred seventy-three".