8262640 has 40 divisors (see below), whose sum is σ = 19351440. Its totient is φ = 3280896.

The previous prime is 8262637. The next prime is 8262677. The reversal of 8262640 is 462628.

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

It is a junction number, because it is equal to n+sod(n) for n = 8262599 and 8262608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14032 + ... + 14608.

It is an arithmetic number, because the mean of its divisors is an integer number (483786).

Almost surely, 2^8262640 is an apocalyptic number.

8262640 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 8262640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9675720).

8262640 is an abundant number, since it is smaller than the sum of its proper divisors (11088800).

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

8262640 is a wasteful number, since it uses less digits than its factorization.

8262640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 8262640 is about 2874.4808226878. The cubic root of 8262640 is about 202.1651428664.

The spelling of 8262640 in words is "eight million, two hundred sixty-two thousand, six hundred forty".