3855041729 has 36 divisors (see below), whose sum is σ = 5062682772. Its totient is φ = 2922575040.

The previous prime is 3855041683. The next prime is 3855041759. The reversal of 3855041729 is 9271405583.

It can be written as a sum of positive squares in 2 ways, for example, as 3107839504 + 747202225 = 55748^2 + 27335^2 .

It is not a de Polignac number, because 3855041729 - 2²⁸ = 3586606273 is a prime.

It is a super-3 number, since 3×3855041729³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 3855041729.

It is not an unprimeable number, because it can be changed into a prime (3855041759) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 210587 + ... + 228159.

It is an arithmetic number, because the mean of its divisors is an integer number (140630077).

Almost surely, 2^3855041729 is an apocalyptic number.

It is an amenable number.

3855041729 is a deficient number, since it is larger than the sum of its proper divisors (1207641043).

3855041729 is a wasteful number, since it uses less digits than its factorization.

3855041729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17646 (or 17628 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 3855041729 is about 62088.9823479174. The cubic root of 3855041729 is about 1567.9890584377.

The spelling of 3855041729 in words is "three billion, eight hundred fifty-five million, forty-one thousand, seven hundred twenty-nine".