3781854 has 36 divisors (see below), whose sum is σ = 8716344. Its totient is φ = 1184832.

The previous prime is 3781853. The next prime is 3781859. The reversal of 3781854 is 4581873.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781853) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4839 + ... + 5565.

Almost surely, 2^3781854 is an apocalyptic number.

3781854 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3781854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4358172).

3781854 is an abundant number, since it is smaller than the sum of its proper divisors (4934490).

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

3781854 is a wasteful number, since it uses less digits than its factorization.

3781854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 749 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 3781854 is about 1944.6989484236. The cubic root of 3781854 is about 155.8002868401.

The spelling of 3781854 in words is "three million, seven hundred eighty-one thousand, eight hundred fifty-four".