396289 has 4 divisors (see below), whose sum is σ = 399280. Its totient is φ = 393300.

The previous prime is 396269. The next prime is 396293. The reversal of 396289 is 982693.

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 396289 - 2¹¹ = 394241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287 + ... + 1564.

It is an arithmetic number, because the mean of its divisors is an integer number (99820).

It is a Proth number, since it is equal to 387 ⋅ 2¹⁰ + 1 and 387 < 2¹⁰.

2³⁹⁶²⁸⁹ is an apocalyptic number.

It is an amenable number.

396289 is a deficient number, since it is larger than the sum of its proper divisors (2991).

396289 is a wasteful number, since it uses less digits than its factorization.

396289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990.

The product of its digits is 23328, while the sum is 37.

The square root of 396289 is about 629.5148925959. The cubic root of 396289 is about 73.4520643213.

It can be divided in two parts, 39 and 6289, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 396289 in words is "three hundred ninety-six thousand, two hundred eighty-nine".