3840385 has 8 divisors (see below), whose sum is σ = 4879656. Its totient is φ = 2891520.

The previous prime is 3840359. The next prime is 3840391. The reversal of 3840385 is 5830483.

It can be written as a sum of positive squares in 4 ways, for example, as 123201 + 3717184 = 351^2 + 1928^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3840385 - 2⁷ = 3840257 is a prime.

It is a Duffinian number.

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, 22506 + ... + 22675.

It is an arithmetic number, because the mean of its divisors is an integer number (609957).

Almost surely, 2^3840385 is an apocalyptic number.

It is an amenable number.

3840385 is a deficient number, since it is larger than the sum of its proper divisors (1039271).

3840385 is a wasteful number, since it uses less digits than its factorization.

3840385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45203.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 3840385 is about 1959.6900265093. The cubic root of 3840385 is about 156.5999388887.

It can be divided in two parts, 3840 and 385, that added together give a square (4225 = 65²).

The spelling of 3840385 in words is "three million, eight hundred forty thousand, three hundred eighty-five".