8291040 has 96 divisors (see below), whose sum is σ = 27288576. Its totient is φ = 2112000.

The previous prime is 8291039. The next prime is 8291047. The reversal of 8291040 is 401928.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 8291040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8291047) 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, 10665 + ... + 11415.

It is an arithmetic number, because the mean of its divisors is an integer number (284256).

Almost surely, 2^8291040 is an apocalyptic number.

8291040 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 8291040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13644288).

8291040 is an abundant number, since it is smaller than the sum of its proper divisors (18997536).

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

8291040 is a wasteful number, since it uses less digits than its factorization.

8291040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 8291040 is about 2879.4166075787. The cubic root of 8291040 is about 202.3965025147.

Adding to 8291040 its reverse (401928), we get a palindrome (8692968).

The spelling of 8291040 in words is "eight million, two hundred ninety-one thousand, forty".