8340220 has 48 divisors (see below), whose sum is σ = 20518848. Its totient is φ = 2787840.

The previous prime is 8340187. The next prime is 8340223. The reversal of 8340220 is 220438.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8340223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5014 + ... + 6466.

It is an arithmetic number, because the mean of its divisors is an integer number (427476).

Almost surely, 2^8340220 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 8340220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10259424).

8340220 is an abundant number, since it is smaller than the sum of its proper divisors (12178628).

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

8340220 is a wasteful number, since it uses less digits than its factorization.

8340220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 8340220 is about 2887.9439052724. The cubic root of 8340220 is about 202.7958992722.

Adding to 8340220 its reverse (220438), we get a palindrome (8560658).

The spelling of 8340220 in words is "eight million, three hundred forty thousand, two hundred twenty".