8381672 has 32 divisors (see below), whose sum is σ = 17146080. Its totient is φ = 3817920.

The previous prime is 8381669. The next prime is 8381693. The reversal of 8381672 is 2761838.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8147 + ... + 9117.

It is an arithmetic number, because the mean of its divisors is an integer number (535815).

Almost surely, 2^8381672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8381672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8573040).

8381672 is an abundant number, since it is smaller than the sum of its proper divisors (8764408).

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

8381672 is a wasteful number, since it uses less digits than its factorization.

8381672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073 (or 1069 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 8381672 is about 2895.1117422303. Note that the first 3 decimals coincide. The cubic root of 8381672 is about 203.1313183676.

It can be divided in two parts, 83 and 81672, that multiplied together give a palindrome (6778776).

The spelling of 8381672 in words is "eight million, three hundred eighty-one thousand, six hundred seventy-two".