5818640 has 20 divisors (see below), whose sum is σ = 13528524. Its totient is φ = 2327424.

The previous prime is 5818633. The next prime is 5818643. The reversal of 5818640 is 468185.

It can be written as a sum of positive squares in 2 ways, for example, as 3936256 + 1882384 = 1984^2 + 1372^2 .

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 = 5818597 and 5818606.

It is not an unprimeable number, because it can be changed into a prime (5818643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36287 + ... + 36446.

Almost surely, 2^5818640 is an apocalyptic number.

It is an amenable number.

5818640 is an abundant number, since it is smaller than the sum of its proper divisors (7709884).

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

5818640 is a wasteful number, since it uses less digits than its factorization.

5818640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72746 (or 72740 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 5818640 is about 2412.1857308259. The cubic root of 5818640 is about 179.8624463504.

The spelling of 5818640 in words is "five million, eight hundred eighteen thousand, six hundred forty".