3840805 has 4 divisors (see below), whose sum is σ = 4608972. Its totient is φ = 3072640.

The previous prime is 3840791. The next prime is 3840821. The reversal of 3840805 is 5080483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2405601 + 1435204 = 1551^2 + 1198^2 .

It is not a de Polignac number, because 3840805 - 2¹³ = 3832613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384076 + ... + 384085.

It is an arithmetic number, because the mean of its divisors is an integer number (1152243).

Almost surely, 2^3840805 is an apocalyptic number.

It is an amenable number.

3840805 is a deficient number, since it is larger than the sum of its proper divisors (768167).

3840805 is an equidigital number, since it uses as much as digits as its factorization.

3840805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768166.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 3840805 is about 1959.7971833840. The cubic root of 3840805 is about 156.6056474810.

The spelling of 3840805 in words is "three million, eight hundred forty thousand, eight hundred five".