3840345 has 16 divisors (see below), whose sum is σ = 6827520. Its totient is φ = 2048112.

The previous prime is 3840329. The next prime is 3840349. The reversal of 3840345 is 5430483.

It is a happy number.

It is not a de Polignac number, because 3840345 - 2⁴ = 3840329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3840349) 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, 14089 + ... + 14358.

It is an arithmetic number, because the mean of its divisors is an integer number (426720).

Almost surely, 2^3840345 is an apocalyptic number.

It is an amenable number.

3840345 is a deficient number, since it is larger than the sum of its proper divisors (2987175).

3840345 is a wasteful number, since it uses less digits than its factorization.

3840345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28461 (or 28455 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 3840345 is about 1959.6798207871. The cubic root of 3840345 is about 156.5993951915.

The spelling of 3840345 in words is "three million, eight hundred forty thousand, three hundred forty-five".