8426240 has 72 divisors (see below), whose sum is σ = 20971440. Its totient is φ = 3239936.

The previous prime is 8426227. The next prime is 8426261. The reversal of 8426240 is 426248.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37007 + ... + 37233.

It is an arithmetic number, because the mean of its divisors is an integer number (291270).

Almost surely, 2^8426240 is an apocalyptic number.

8426240 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 8426240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10485720).

8426240 is an abundant number, since it is smaller than the sum of its proper divisors (12545200).

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

8426240 is a wasteful number, since it uses less digits than its factorization.

8426240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 8426240 is about 2902.7986495794. The cubic root of 8426240 is about 203.4907199152.

The spelling of 8426240 in words is "eight million, four hundred twenty-six thousand, two hundred forty".