8690240 has 56 divisors (see below), whose sum is σ = 22296120. Its totient is φ = 3207168.

The previous prime is 8690221. The next prime is 8690267. The reversal of 8690240 is 420968.

It can be written as a sum of positive squares in 4 ways, for example, as 984064 + 7706176 = 992^2 + 2776^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3116 + ... + 5204.

It is an arithmetic number, because the mean of its divisors is an integer number (398145).

Almost surely, 2^8690240 is an apocalyptic number.

8690240 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 8690240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11148060).

8690240 is an abundant number, since it is smaller than the sum of its proper divisors (13605880).

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

8690240 is a wasteful number, since it uses less digits than its factorization.

8690240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119 (or 2109 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 8690240 is about 2947.9213015276. The cubic root of 8690240 is about 205.5940729163.

The spelling of 8690240 in words is "eight million, six hundred ninety thousand, two hundred forty".