8421376 has 32 divisors (see below), whose sum is σ = 16908030. Its totient is φ = 4194304.

The previous prime is 8421251. The next prime is 8421403. The reversal of 8421376 is 6731248.

It can be written as a sum of positive squares in only one way, i.e., 4734976 + 3686400 = 2176^2 + 1920^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (2) of ones.

In principle, a polygon with 8421376 sides can be constructed with ruler and compass.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32640 + ... + 32896.

Almost surely, 2^8421376 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 8421376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8454015).

8421376 is an abundant number, since it is smaller than the sum of its proper divisors (8486654).

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

8421376 is an frugal number, since it uses more digits than its factorization.

8421376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 259 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 8421376 is about 2901.9607164812. The cubic root of 8421376 is about 203.4515577515.

The spelling of 8421376 in words is "eight million, four hundred twenty-one thousand, three hundred seventy-six".