3956389 has 4 divisors (see below), whose sum is σ = 4164640. Its totient is φ = 3748140.

The previous prime is 3956353. The next prime is 3956401. The reversal of 3956389 is 9836593.

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 3956389 - 2⁷ = 3956261 is a prime.

It is a d-powerful number, because it can be written as 3⁷ + 9² + 5³ + 6⁸ + 3¹¹ + 8⁷ + 9² .

It is a Duffinian number.

3956389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3950389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104097 + ... + 104134.

It is an arithmetic number, because the mean of its divisors is an integer number (1041160).

Almost surely, 2^3956389 is an apocalyptic number.

It is an amenable number.

3956389 is a deficient number, since it is larger than the sum of its proper divisors (208251).

3956389 is a wasteful number, since it uses less digits than its factorization.

3956389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208250.

The product of its digits is 174960, while the sum is 43.

The square root of 3956389 is about 1989.0673693970. The cubic root of 3956389 is about 158.1610945739.

The spelling of 3956389 in words is "three million, nine hundred fifty-six thousand, three hundred eighty-nine".