8721358 has 4 divisors (see below), whose sum is σ = 13082040. Its totient is φ = 4360678.

The previous prime is 8721329. The next prime is 8721359. The reversal of 8721358 is 8531278.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8721359) by changing a digit.

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 as a sum of consecutive naturals, namely, 2180338 + ... + 2180341.

It is an arithmetic number, because the mean of its divisors is an integer number (3270510).

Almost surely, 2^8721358 is an apocalyptic number.

8721358 is a deficient number, since it is larger than the sum of its proper divisors (4360682).

8721358 is a wasteful number, since it uses less digits than its factorization.

8721358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4360681.

The product of its digits is 13440, while the sum is 34.

The square root of 8721358 is about 2953.1945415092. The cubic root of 8721358 is about 205.8391775874.

The spelling of 8721358 in words is "eight million, seven hundred twenty-one thousand, three hundred fifty-eight".