3781828 has 6 divisors (see below), whose sum is σ = 6618206. Its totient is φ = 1890912.

The previous prime is 3781819. The next prime is 3781829. The reversal of 3781828 is 8281873.

3781828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1937664 + 1844164 = 1392^2 + 1358^2 .

It is not an unprimeable number, because it can be changed into a prime (3781829) 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 as a sum of consecutive naturals, namely, 472725 + ... + 472732.

Almost surely, 2^3781828 is an apocalyptic number.

It is an amenable number.

3781828 is a deficient number, since it is larger than the sum of its proper divisors (2836378).

3781828 is a wasteful number, since it uses less digits than its factorization.

3781828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945461 (or 945459 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 3781828 is about 1944.6922635728. The cubic root of 3781828 is about 155.7999298004.

The spelling of 3781828 in words is "three million, seven hundred eighty-one thousand, eight hundred twenty-eight".