396009 has 10 divisors (see below), whose sum is σ = 591690. Its totient is φ = 263952.

The previous prime is 396001. The next prime is 396029. The reversal of 396009 is 900693.

It can be written as a sum of positive squares in only one way, i.e., 363609 + 32400 = 603^2 + 180^2 .

It is not a de Polignac number, because 396009 - 2³ = 396001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2364 + ... + 2525.

It is an arithmetic number, because the mean of its divisors is an integer number (59169).

2³⁹⁶⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

396009 is a deficient number, since it is larger than the sum of its proper divisors (195681).

396009 is an equidigital number, since it uses as much as digits as its factorization.

396009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4901 (or 4892 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 396009 is about 629.2924598309. The cubic root of 396009 is about 73.4347609360.

The spelling of 396009 in words is "three hundred ninety-six thousand, nine".