28447329 has 8 divisors (see below), whose sum is σ = 38496160. Its totient is φ = 18681696.

The previous prime is 28447327. The next prime is 28447333. The reversal of 28447329 is 92374482.

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

It is not a de Polignac number, because 28447329 - 2¹ = 28447327 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28447327) 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, 70564 + ... + 70965.

It is an arithmetic number, because the mean of its divisors is an integer number (4812020).

Almost surely, 2^28447329 is an apocalyptic number.

It is an amenable number.

28447329 is a deficient number, since it is larger than the sum of its proper divisors (10048831).

28447329 is a wasteful number, since it uses less digits than its factorization.

28447329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141599.

The product of its digits is 96768, while the sum is 39.

The square root of 28447329 is about 5333.6037535610. The cubic root of 28447329 is about 305.2674497232.

The spelling of 28447329 in words is "twenty-eight million, four hundred forty-seven thousand, three hundred twenty-nine".