8729445 has 16 divisors (see below), whose sum is σ = 14418432. Its totient is φ = 4505280.

The previous prime is 8729429. The next prime is 8729467. The reversal of 8729445 is 5449278.

It is not a de Polignac number, because 8729445 - 2⁴ = 8729429 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8922 + ... + 9851.

It is an arithmetic number, because the mean of its divisors is an integer number (901152).

Almost surely, 2^8729445 is an apocalyptic number.

It is an amenable number.

8729445 is a deficient number, since it is larger than the sum of its proper divisors (5688987).

8729445 is a wasteful number, since it uses less digits than its factorization.

8729445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18812.

The product of its digits is 80640, while the sum is 39.

The square root of 8729445 is about 2954.5634195258. The cubic root of 8729445 is about 205.9027803421.

The spelling of 8729445 in words is "eight million, seven hundred twenty-nine thousand, four hundred forty-five".