8440213 has 4 divisors (see below), whose sum is σ = 8619840. Its totient is φ = 8260588.

The previous prime is 8440207. The next prime is 8440231. The reversal of 8440213 is 3120448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8440213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8440613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89743 + ... + 89836.

It is an arithmetic number, because the mean of its divisors is an integer number (2154960).

Almost surely, 2^8440213 is an apocalyptic number.

It is an amenable number.

8440213 is a deficient number, since it is larger than the sum of its proper divisors (179627).

8440213 is a wasteful number, since it uses less digits than its factorization.

8440213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179626.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 8440213 is about 2905.2044678473. The cubic root of 8440213 is about 203.6031388027.

The spelling of 8440213 in words is "eight million, four hundred forty thousand, two hundred thirteen".