3781836 has 72 divisors (see below), whose sum is σ = 10454640. Its totient is φ = 1181952.

The previous prime is 3781829. The next prime is 3781849. The reversal of 3781836 is 6381873.

3781836 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3781836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38940 + ... + 39036.

Almost surely, 2^3781836 is an apocalyptic number.

3781836 is a gapful number since it is divisible by the number (36) 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 3781836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5227320).

3781836 is an abundant number, since it is smaller than the sum of its proper divisors (6672804).

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

3781836 is a wasteful number, since it uses less digits than its factorization.

3781836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 121 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 3781836 is about 1944.6943204524. The cubic root of 3781836 is about 155.8000396589.

The spelling of 3781836 in words is "three million, seven hundred eighty-one thousand, eight hundred thirty-six".