3855631 has 4 divisors (see below), whose sum is σ = 4152232. Its totient is φ = 3559032.

The previous prime is 3855623. The next prime is 3855647. The reversal of 3855631 is 1365583.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3855631 - 2³ = 3855623 is a prime.

It is a super-2 number, since 2×3855631² = 29731780816322, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3⁹ + 8⁷ + 5 + 5³ + 6⁸ + 3¹⁰ + 1 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3855593 and 3855602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3855331) 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 3 ways as a sum of consecutive naturals, for example, 148281 + ... + 148306.

It is an arithmetic number, because the mean of its divisors is an integer number (1038058).

Almost surely, 2^3855631 is an apocalyptic number.

3855631 is a deficient number, since it is larger than the sum of its proper divisors (296601).

3855631 is a wasteful number, since it uses less digits than its factorization.

3855631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296600.

The product of its digits is 10800, while the sum is 31.

The square root of 3855631 is about 1963.5760744112. The cubic root of 3855631 is about 156.8068947189.

The spelling of 3855631 in words is "three million, eight hundred fifty-five thousand, six hundred thirty-one".