3688040 has 32 divisors (see below), whose sum is σ = 8371080. Its totient is φ = 1462272.

The previous prime is 3688021. The next prime is 3688057. The reversal of 3688040 is 408863.

It can be written as a sum of positive squares in 4 ways, for example, as 2815684 + 872356 = 1678^2 + 934^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3687994 and 3688012.

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, 5144 + ... + 5816.

Almost surely, 2^3688040 is an apocalyptic number.

It is an amenable number.

3688040 is an abundant number, since it is smaller than the sum of its proper divisors (4683040).

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

3688040 is a wasteful number, since it uses less digits than its factorization.

3688040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 3688040 is about 1920.4270358439. The cubic root of 3688040 is about 154.5012061642.

The spelling of 3688040 in words is "three million, six hundred eighty-eight thousand, forty".