3888661 has 4 divisors (see below), whose sum is σ = 4444192. Its totient is φ = 3333132.

The previous prime is 3888653. The next prime is 3888683. The reversal of 3888661 is 1668883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3888661 - 2³ = 3888653 is a prime.

It is a Duffinian number.

3888661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3888611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277755 + ... + 277768.

It is an arithmetic number, because the mean of its divisors is an integer number (1111048).

Almost surely, 2^3888661 is an apocalyptic number.

It is an amenable number.

3888661 is a deficient number, since it is larger than the sum of its proper divisors (555531).

3888661 is an equidigital number, since it uses as much as digits as its factorization.

3888661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555530.

The product of its digits is 55296, while the sum is 40.

The square root of 3888661 is about 1971.9688131408. The cubic root of 3888661 is about 157.2533942076.

The spelling of 3888661 in words is "three million, eight hundred eighty-eight thousand, six hundred sixty-one".