28328347 has 8 divisors (see below), whose sum is σ = 29252096. Its totient is φ = 27412992.

The previous prime is 28328329. The next prime is 28328369. The reversal of 28328347 is 74382382.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28328347 - 2¹¹ = 28326299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28322347) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5158 + ... + 9124.

It is an arithmetic number, because the mean of its divisors is an integer number (3656512).

Almost surely, 2^28328347 is an apocalyptic number.

28328347 is a deficient number, since it is larger than the sum of its proper divisors (923749).

28328347 is a wasteful number, since it uses less digits than its factorization.

28328347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4197.

The product of its digits is 64512, while the sum is 37.

The square root of 28328347 is about 5322.4380691559. The cubic root of 28328347 is about 304.8412575356.

The spelling of 28328347 in words is "twenty-eight million, three hundred twenty-eight thousand, three hundred forty-seven".