8302640 has 40 divisors (see below), whose sum is σ = 19604400. Its totient is φ = 3269376.

The previous prime is 8302633. The next prime is 8302673. The reversal of 8302640 is 462038.

It is a happy number.

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

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4586 + ... + 6134.

It is an arithmetic number, because the mean of its divisors is an integer number (490110).

Almost surely, 2^8302640 is an apocalyptic number.

8302640 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 8302640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9802200).

8302640 is an abundant number, since it is smaller than the sum of its proper divisors (11301760).

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

8302640 is a wasteful number, since it uses less digits than its factorization.

8302640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 8302640 is about 2881.4302004387. The cubic root of 8302640 is about 202.4908495586.

Adding to 8302640 its reverse (462038), we get a palindrome (8764678).

The spelling of 8302640 in words is "eight million, three hundred two thousand, six hundred forty".