8264640 has 56 divisors (see below), whose sum is σ = 26243280. Its totient is φ = 2203648.

The previous prime is 8264611. The next prime is 8264689. The reversal of 8264640 is 464628.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 8264598 and 8264607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3345 + ... + 5264.

It is an arithmetic number, because the mean of its divisors is an integer number (468630).

Almost surely, 2^8264640 is an apocalyptic number.

8264640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8264640 is an abundant number, since it is smaller than the sum of its proper divisors (17978640).

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

8264640 is a wasteful number, since it uses less digits than its factorization.

8264640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8629 (or 8619 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 8264640 is about 2874.8286905484. The cubic root of 8264640 is about 202.1814531364.

The spelling of 8264640 in words is "eight million, two hundred sixty-four thousand, six hundred forty".