3781800 has 144 divisors (see below), whose sum is σ = 13927680. Its totient is φ = 912000.

The previous prime is 3781781. The next prime is 3781801. The reversal of 3781800 is 81873.

3781800 = 50² + 51² + ... + 225².

3781800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3781800² = 28604022480000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3781801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19705 + ... + 19895.

It is an arithmetic number, because the mean of its divisors is an integer number (96720).

Almost surely, 2^3781800 is an apocalyptic number.

3781800 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 3781800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6963840).

3781800 is an abundant number, since it is smaller than the sum of its proper divisors (10145880).

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

3781800 is a wasteful number, since it uses less digits than its factorization.

3781800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 3781800 is about 1944.6850644770. The cubic root of 3781800 is about 155.7995452942.

The spelling of 3781800 in words is "three million, seven hundred eighty-one thousand, eight hundred".