3813765 has 16 divisors (see below), whose sum is σ = 6189696. Its totient is φ = 2004800.

The previous prime is 3813757. The next prime is 3813769. The reversal of 3813765 is 5673183.

3813765 = T₃₈₉ + T₃₉₀ + ... + T₄₃₃.

It is a happy number.

It is not a de Polignac number, because 3813765 - 2³ = 3813757 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3813769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726 + ... + 2855.

It is an arithmetic number, because the mean of its divisors is an integer number (386856).

Almost surely, 2^3813765 is an apocalyptic number.

It is an amenable number.

3813765 is a deficient number, since it is larger than the sum of its proper divisors (2375931).

3813765 is a wasteful number, since it uses less digits than its factorization.

3813765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660.

The product of its digits is 15120, while the sum is 33.

The square root of 3813765 is about 1952.8863254168. The cubic root of 3813765 is about 156.2372704296.

The spelling of 3813765 in words is "three million, eight hundred thirteen thousand, seven hundred sixty-five".