8372240 has 40 divisors (see below), whose sum is σ = 19593240. Its totient is φ = 3326976.

The previous prime is 8372237. The next prime is 8372261. The reversal of 8372240 is 422738.

It can be written as a sum of positive squares in 4 ways, for example, as 4194304 + 4177936 = 2048^2 + 2044^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18092 + ... + 18548.

It is an arithmetic number, because the mean of its divisors is an integer number (489831).

Almost surely, 2^8372240 is an apocalyptic number.

8372240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8372240 is an abundant number, since it is smaller than the sum of its proper divisors (11221000).

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

8372240 is a wasteful number, since it uses less digits than its factorization.

8372240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 8372240 is about 2893.4823310330. The cubic root of 8372240 is about 203.0550943668.

Adding to 8372240 its reverse (422738), we get a palindrome (8794978).

The spelling of 8372240 in words is "eight million, three hundred seventy-two thousand, two hundred forty".