3989145 has 16 divisors (see below), whose sum is σ = 6719040. Its totient is φ = 2015424.

The previous prime is 3989137. The next prime is 3989147. The reversal of 3989145 is 5419893.

It is not a de Polignac number, because 3989145 - 2³ = 3989137 is a prime.

3989145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3989147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6714 + ... + 7283.

It is an arithmetic number, because the mean of its divisors is an integer number (419940).

Almost surely, 2^3989145 is an apocalyptic number.

It is an amenable number.

3989145 is a deficient number, since it is larger than the sum of its proper divisors (2729895).

3989145 is a wasteful number, since it uses less digits than its factorization.

3989145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14024.

The product of its digits is 38880, while the sum is 39.

The square root of 3989145 is about 1997.2844063878. The cubic root of 3989145 is about 158.5963814547.

The spelling of 3989145 in words is "three million, nine hundred eighty-nine thousand, one hundred forty-five".