3840407 has 4 divisors (see below), whose sum is σ = 3850920. Its totient is φ = 3829896.

The previous prime is 3840401. The next prime is 3840409. The reversal of 3840407 is 7040483.

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

It is a cyclic number.

It is not a de Polignac number, because 3840407 - 2⁴ = 3840391 is a prime.

It is a super-3 number, since 3×3840407³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4688 + ... + 5445.

It is an arithmetic number, because the mean of its divisors is an integer number (962730).

Almost surely, 2^3840407 is an apocalyptic number.

3840407 is a deficient number, since it is larger than the sum of its proper divisors (10513).

3840407 is a wasteful number, since it uses less digits than its factorization.

3840407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10512.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 3840407 is about 1959.6956396339. The cubic root of 3840407 is about 156.6002379205.

The spelling of 3840407 in words is "three million, eight hundred forty thousand, four hundred seven".