8164240 has 80 divisors (see below), whose sum is σ = 22141440. Its totient is φ = 2741760.

The previous prime is 8164217. The next prime is 8164249. The reversal of 8164240 is 424618.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8164249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34041 + ... + 34279.

It is an arithmetic number, because the mean of its divisors is an integer number (276768).

Almost surely, 2^8164240 is an apocalyptic number.

8164240 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 8164240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11070720).

8164240 is an abundant number, since it is smaller than the sum of its proper divisors (13977200).

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

8164240 is a wasteful number, since it uses less digits than its factorization.

8164240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 8164240 is about 2857.3134234802. The cubic root of 8164240 is about 201.3594058112.

Adding to 8164240 its reverse (424618), we get a palindrome (8588858).

The spelling of 8164240 in words is "eight million, one hundred sixty-four thousand, two hundred forty".