8623640 has 32 divisors (see below), whose sum is σ = 19656000. Its totient is φ = 3404544.

The previous prime is 8623639. The next prime is 8623651. The reversal of 8623640 is 463268.

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, 1796 + ... + 4524.

It is an arithmetic number, because the mean of its divisors is an integer number (614250).

Almost surely, 2^8623640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8623640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9828000).

8623640 is an abundant number, since it is smaller than the sum of its proper divisors (11032360).

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

8623640 is a wasteful number, since it uses less digits than its factorization.

8623640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819 (or 2815 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 8623640 is about 2936.6034802132. The cubic root of 8623640 is about 205.0675169240.

The spelling of 8623640 in words is "eight million, six hundred twenty-three thousand, six hundred forty".