3945489 has 16 divisors (see below), whose sum is σ = 5535744. Its totient is φ = 2494800.

The previous prime is 3945467. The next prime is 3945527. The reversal of 3945489 is 9845493.

It is not a de Polignac number, because 3945489 - 2⁵ = 3945457 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3945489.

It is not an unprimeable number, because it can be changed into a prime (3945449) 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, 14424 + ... + 14694.

It is an arithmetic number, because the mean of its divisors is an integer number (345984).

Almost surely, 2^3945489 is an apocalyptic number.

It is an amenable number.

3945489 is a deficient number, since it is larger than the sum of its proper divisors (1590255).

3945489 is a wasteful number, since it uses less digits than its factorization.

3945489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508.

The product of its digits is 155520, while the sum is 42.

The square root of 3945489 is about 1986.3255020263. The cubic root of 3945489 is about 158.0157144013.

The spelling of 3945489 in words is "three million, nine hundred forty-five thousand, four hundred eighty-nine".