8372220 has 24 divisors (see below), whose sum is σ = 23442384. Its totient is φ = 2232576.

The previous prime is 8372219. The next prime is 8372227. The reversal of 8372220 is 222738.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8372227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69709 + ... + 69828.

It is an arithmetic number, because the mean of its divisors is an integer number (976766).

Almost surely, 2^8372220 is an apocalyptic number.

It is an amenable number.

8372220 is an abundant number, since it is smaller than the sum of its proper divisors (15070164).

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

8372220 is a wasteful number, since it uses less digits than its factorization.

8372220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139549 (or 139547 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 8372220 is about 2893.4788749877. The cubic root of 8372220 is about 203.0549326775.

Adding to 8372220 its reverse (222738), we get a palindrome (8594958).

The spelling of 8372220 in words is "eight million, three hundred seventy-two thousand, two hundred twenty".