3828661 has 2 divisors, whose sum is σ = 3828662. Its totient is φ = 3828660.

The previous prime is 3828659. The next prime is 3828673. The reversal of 3828661 is 1668283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3352561 + 476100 = 1831^2 + 690^2 .

It is a cyclic number.

It is not a de Polignac number, because 3828661 - 2¹ = 3828659 is a prime.

Together with 3828659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3828611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1914330 + 1914331.

It is an arithmetic number, because the mean of its divisors is an integer number (1914331).

Almost surely, 2^3828661 is an apocalyptic number.

It is an amenable number.

3828661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3828661 is an equidigital number, since it uses as much as digits as its factorization.

3828661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 3828661 is about 1956.6964506535. The cubic root of 3828661 is about 156.4404193647.

It can be divided in two parts, 3828 and 661, that added together give a square (4489 = 67²).

The spelling of 3828661 in words is "three million, eight hundred twenty-eight thousand, six hundred sixty-one".