8391872 has 28 divisors (see below), whose sum is σ = 17379696. Its totient is φ = 4012800.

The previous prime is 8391841. The next prime is 8391893. The reversal of 8391872 is 2781938.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1379 + ... + 4322.

Almost surely, 2^8391872 is an apocalyptic number.

It is an amenable number.

8391872 is an abundant number, since it is smaller than the sum of its proper divisors (8987824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8391872 is a wasteful number, since it uses less digits than its factorization.

8391872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5736 (or 5726 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 8391872 is about 2896.8727966550. The cubic root of 8391872 is about 203.2136845724.

The spelling of 8391872 in words is "eight million, three hundred ninety-one thousand, eight hundred seventy-two".