3840661 has 6 divisors (see below), whose sum is σ = 4221686. Its totient is φ = 3491400.

The previous prime is 3840649. The next prime is 3840667. The reversal of 3840661 is 1660483.

It can be written as a sum of positive squares in only one way, i.e., 3538161 + 302500 = 1881^2 + 550^2 .

It is not a de Polignac number, because 3840661 - 2⁷ = 3840533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15750 + ... + 15991.

Almost surely, 2^3840661 is an apocalyptic number.

It is an amenable number.

3840661 is a deficient number, since it is larger than the sum of its proper divisors (381025).

3840661 is a wasteful number, since it uses less digits than its factorization.

3840661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31763 (or 31752 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 3840661 is about 1959.7604445442. The cubic root of 3840661 is about 156.6036902962.

The spelling of 3840661 in words is "three million, eight hundred forty thousand, six hundred sixty-one".