3855138 has 32 divisors (see below), whose sum is σ = 9277440. Its totient is φ = 1043280.

The previous prime is 3855133. The next prime is 3855143. The reversal of 3855138 is 8315583.

3855138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3855133) and next prime (3855143).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3855099 and 3855108.

It is not an unprimeable number, because it can be changed into a prime (3855133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1618 + ... + 3213.

It is an arithmetic number, because the mean of its divisors is an integer number (289920).

Almost surely, 2^3855138 is an apocalyptic number.

3855138 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3855138 is an abundant number, since it is smaller than the sum of its proper divisors (5422302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3855138 is a wasteful number, since it uses less digits than its factorization.

3855138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4862.

The product of its digits is 14400, while the sum is 33.

The square root of 3855138 is about 1963.4505341363. The cubic root of 3855138 is about 156.8002110663.

It can be divided in two parts, 3855 and 138, that added together give a palindrome (3993).

The spelling of 3855138 in words is "three million, eight hundred fifty-five thousand, one hundred thirty-eight".