3855387405 has 16 divisors (see below), whose sum is σ = 6179590080. Its totient is φ = 2052549888.

The previous prime is 3855387311. The next prime is 3855387407. The reversal of 3855387405 is 5047835583.

3855387405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3855387405 - 2⁹ = 3855386893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3855387407) 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, 219820 + ... + 236709.

It is an arithmetic number, because the mean of its divisors is an integer number (386224380).

Almost surely, 2^3855387405 is an apocalyptic number.

It is an amenable number.

3855387405 is a deficient number, since it is larger than the sum of its proper divisors (2324202675).

3855387405 is a wasteful number, since it uses less digits than its factorization.

3855387405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457100.

The product of its (nonzero) digits is 2016000, while the sum is 48.

The square root of 3855387405 is about 62091.7660000100. The cubic root of 3855387405 is about 1568.0359234718.

The spelling of 3855387405 in words is "three billion, eight hundred fifty-five million, three hundred eighty-seven thousand, four hundred five".