8514640 has 20 divisors (see below), whose sum is σ = 19796724. Its totient is φ = 3405824.

The previous prime is 8514619. The next prime is 8514683. The reversal of 8514640 is 464158.

It can be written as a sum of positive squares in 2 ways, for example, as 4562496 + 3952144 = 2136^2 + 1988^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 8514599 and 8514608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53137 + ... + 53296.

Almost surely, 2^8514640 is an apocalyptic number.

8514640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8514640 is an abundant number, since it is smaller than the sum of its proper divisors (11282084).

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

8514640 is a wasteful number, since it uses less digits than its factorization.

8514640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106446 (or 106440 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 8514640 is about 2917.9856065444. The cubic root of 8514640 is about 204.1998554034.

Adding to 8514640 its reverse (464158), we get a palindrome (8978798).

The spelling of 8514640 in words is "eight million, five hundred fourteen thousand, six hundred forty".