8122240 has 128 divisors (see below), whose sum is σ = 23256000. Its totient is φ = 2709504.

The previous prime is 8122237. The next prime is 8122241. The reversal of 8122240 is 422218.

It is a tau number, because it is divible by the number of its divisors (128).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8122241) 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, 219502 + ... + 219538.

Almost surely, 2^8122240 is an apocalyptic number.

8122240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8122240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11628000).

8122240 is an abundant number, since it is smaller than the sum of its proper divisors (15133760).

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

8122240 is an equidigital number, since it uses as much as digits as its factorization.

8122240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 8122240 is about 2849.9543855999. The cubic root of 8122240 is about 201.0135218579.

Adding to 8122240 its reverse (422218), we get a palindrome (8544458).

The spelling of 8122240 in words is "eight million, one hundred twenty-two thousand, two hundred forty".