3840729 has 8 divisors (see below), whose sum is σ = 5144832. Its totient is φ = 2548560.

The previous prime is 3840721. The next prime is 3840737. The reversal of 3840729 is 9270483.

It is an interprime number because it is at equal distance from previous prime (3840721) and next prime (3840737).

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

It is not a de Polignac number, because 3840729 - 2³ = 3840721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3840729.

It is not an unprimeable number, because it can be changed into a prime (3840721) 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 7 ways as a sum of consecutive naturals, for example, 2202 + ... + 3539.

It is an arithmetic number, because the mean of its divisors is an integer number (643104).

Almost surely, 2^3840729 is an apocalyptic number.

It is an amenable number.

3840729 is a deficient number, since it is larger than the sum of its proper divisors (1304103).

3840729 is a wasteful number, since it uses less digits than its factorization.

3840729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5967.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 3840729 is about 1959.7777935266. Note that the first 4 decimals coincide. The cubic root of 3840729 is about 156.6046145285.

The spelling of 3840729 in words is "three million, eight hundred forty thousand, seven hundred twenty-nine".