28471045 has 4 divisors (see below), whose sum is σ = 34165260. Its totient is φ = 22776832.

The previous prime is 28471043. The next prime is 28471061. The reversal of 28471045 is 54017482.

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 19070689 + 9400356 = 4367^2 + 3066^2 .

It is a cyclic number.

It is not a de Polignac number, because 28471045 - 2¹ = 28471043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28470998 and 28471016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28471043) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2847100 + ... + 2847109.

It is an arithmetic number, because the mean of its divisors is an integer number (8541315).

Almost surely, 2^28471045 is an apocalyptic number.

It is an amenable number.

28471045 is a deficient number, since it is larger than the sum of its proper divisors (5694215).

28471045 is an equidigital number, since it uses as much as digits as its factorization.

28471045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5694214.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 28471045 is about 5335.8265526533. The cubic root of 28471045 is about 305.3522580591.

The spelling of 28471045 in words is "twenty-eight million, four hundred seventy-one thousand, forty-five".