8194640 has 20 divisors (see below), whose sum is σ = 19052724. Its totient is φ = 3277824.

The previous prime is 8194631. The next prime is 8194651. The reversal of 8194640 is 464918.

It can be written as a sum of positive squares in 2 ways, for example, as 4477456 + 3717184 = 2116^2 + 1928^2 .

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

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 8194597 and 8194606.

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, 51137 + ... + 51296.

Almost surely, 2^8194640 is an apocalyptic number.

8194640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8194640 is an abundant number, since it is smaller than the sum of its proper divisors (10858084).

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

8194640 is a wasteful number, since it uses less digits than its factorization.

8194640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102446 (or 102440 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 8194640 is about 2862.6281630697. The cubic root of 8194640 is about 201.6090205504.

The spelling of 8194640 in words is "eight million, one hundred ninety-four thousand, six hundred forty".