3811995 has 64 divisors (see below), whose sum is σ = 7879680. Its totient is φ = 1728000.

The previous prime is 3811979. The next prime is 3812023. The reversal of 3811995 is 5991183.

It is a happy number.

It is not a de Polignac number, because 3811995 - 2⁴ = 3811979 is a prime.

3811995 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25170 + ... + 25320.

It is an arithmetic number, because the mean of its divisors is an integer number (123120).

Almost surely, 2^3811995 is an apocalyptic number.

3811995 is an abundant number, since it is smaller than the sum of its proper divisors (4067685).

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

3811995 is a wasteful number, since it uses less digits than its factorization.

3811995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 187 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 3811995 is about 1952.4330974453. The cubic root of 3811995 is about 156.2130963513.

The spelling of 3811995 in words is "three million, eight hundred eleven thousand, nine hundred ninety-five".