5731640 has 16 divisors (see below), whose sum is σ = 12896280. Its totient is φ = 2292640.

The previous prime is 5731639. The next prime is 5731651. The reversal of 5731640 is 461375.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71606 + ... + 71685.

Almost surely, 2^5731640 is an apocalyptic number.

It is an amenable number.

5731640 is an abundant number, since it is smaller than the sum of its proper divisors (7164640).

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

5731640 is a wasteful number, since it uses less digits than its factorization.

5731640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143302 (or 143298 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 5731640 is about 2394.0843761238. The cubic root of 5731640 is about 178.9615097791.

The spelling of 5731640 in words is "five million, seven hundred thirty-one thousand, six hundred forty".