3765640 has 32 divisors (see below), whose sum is σ = 8657280. Its totient is φ = 1473472.

The previous prime is 3765631. The next prime is 3765661. The reversal of 3765640 is 465673.

3765640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879 + ... + 2881.

It is an arithmetic number, because the mean of its divisors is an integer number (270540).

Almost surely, 2^3765640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3765640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4328640).

3765640 is an abundant number, since it is smaller than the sum of its proper divisors (4891640).

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

3765640 is a wasteful number, since it uses less digits than its factorization.

3765640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061 (or 2057 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 3765640 is about 1940.5257019684. The cubic root of 3765640 is about 155.5773129053.

The spelling of 3765640 in words is "three million, seven hundred sixty-five thousand, six hundred forty".