28308347 has 8 divisors (see below), whose sum is σ = 29952000. Its totient is φ = 26680104.

The previous prime is 28308341. The next prime is 28308353. The reversal of 28308347 is 74380382.

It is an interprime number because it is at equal distance from previous prime (28308341) and next prime (28308353).

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

It is not a de Polignac number, because 28308347 - 2²² = 24114043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28308341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38 + ... + 7524.

It is an arithmetic number, because the mean of its divisors is an integer number (3744000).

Almost surely, 2^28308347 is an apocalyptic number.

28308347 is a deficient number, since it is larger than the sum of its proper divisors (1643653).

28308347 is a wasteful number, since it uses less digits than its factorization.

28308347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7705.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 28308347 is about 5320.5588992135. The cubic root of 28308347 is about 304.7695006659.

The spelling of 28308347 in words is "twenty-eight million, three hundred eight thousand, three hundred forty-seven".