8721382 has 8 divisors (see below), whose sum is σ = 13097952. Its totient is φ = 4355400.

The previous prime is 8721379. The next prime is 8721403. The reversal of 8721382 is 2831278.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 94 + ... + 4177.

It is an arithmetic number, because the mean of its divisors is an integer number (1637244).

Almost surely, 2^8721382 is an apocalyptic number.

8721382 is a deficient number, since it is larger than the sum of its proper divisors (4376570).

8721382 is a wasteful number, since it uses less digits than its factorization.

8721382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5294.

The product of its digits is 5376, while the sum is 31.

The square root of 8721382 is about 2953.1986049028. The cubic root of 8721382 is about 205.8393664011.

The spelling of 8721382 in words is "eight million, seven hundred twenty-one thousand, three hundred eighty-two".