3811860 has 120 divisors (see below), whose sum is σ = 12948936. Its totient is φ = 933120.

The previous prime is 3811817. The next prime is 3811877. The reversal of 3811860 is 681183.

It can be written as a sum of positive squares in 4 ways, for example, as 171396 + 3640464 = 414^2 + 1908^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20970 + ... + 21150.

Almost surely, 2^3811860 is an apocalyptic number.

3811860 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3811860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6474468).

3811860 is an abundant number, since it is smaller than the sum of its proper divisors (9137076).

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

3811860 is a wasteful number, since it uses less digits than its factorization.

3811860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 3811860 is about 1952.3985248919. The cubic root of 3811860 is about 156.2112522586.

The spelling of 3811860 in words is "three million, eight hundred eleven thousand, eight hundred sixty".