3989642 has 8 divisors (see below), whose sum is σ = 6111936. Its totient is φ = 1952332.

The previous prime is 3989641. The next prime is 3989651. The reversal of 3989642 is 2469893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3989642.

It is not an unprimeable number, because it can be changed into a prime (3989641) 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, 21128 + ... + 21315.

It is an arithmetic number, because the mean of its divisors is an integer number (763992).

Almost surely, 2^3989642 is an apocalyptic number.

3989642 is a deficient number, since it is larger than the sum of its proper divisors (2122294).

3989642 is a wasteful number, since it uses less digits than its factorization.

3989642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42492.

The product of its digits is 93312, while the sum is 41.

The square root of 3989642 is about 1997.4088214484. The cubic root of 3989642 is about 158.6029675885.

The spelling of 3989642 in words is "three million, nine hundred eighty-nine thousand, six hundred forty-two".