3855636 has 18 divisors (see below), whose sum is σ = 9746282. Its totient is φ = 1285200.

The previous prime is 3855623. The next prime is 3855647. The reversal of 3855636 is 6365583.

3855636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2268036 + 1587600 = 1506^2 + 1260^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 107101 = 3855636 / (3 + 8 + 5 + 5 + 6 + 3 + 6).

It is a d-powerful number, because it can be written as 3⁹ + 8⁷ + 5 + 5³ + 6 + 3¹⁰ + 6⁸ .

It is a self number, because there is not a number n which added to its sum of digits gives 3855636.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 53515 + ... + 53586.

Almost surely, 2^3855636 is an apocalyptic number.

3855636 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3855636 is an abundant number, since it is smaller than the sum of its proper divisors (5890646).

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

3855636 is a wasteful number, since it uses less digits than its factorization.

3855636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107111 (or 107106 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 3855636 is about 1963.5773475980. The cubic root of 3855636 is about 156.8069625015.

The spelling of 3855636 in words is "three million, eight hundred fifty-five thousand, six hundred thirty-six".