396403 has 4 divisors (see below), whose sum is σ = 453040. Its totient is φ = 339768.

The previous prime is 396379. The next prime is 396413. The reversal of 396403 is 304693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304693 = 83 ⋅3671.

It is a cyclic number.

It is not a de Polignac number, because 396403 - 2⁹ = 395891 is a prime.

396403 is a lucky number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (396413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28308 + ... + 28321.

It is an arithmetic number, because the mean of its divisors is an integer number (113260).

2³⁹⁶⁴⁰³ is an apocalyptic number.

396403 is a deficient number, since it is larger than the sum of its proper divisors (56637).

396403 is an equidigital number, since it uses as much as digits as its factorization.

396403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56636.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 396403 is about 629.6054319969. The cubic root of 396403 is about 73.4591069362.

The spelling of 396403 in words is "three hundred ninety-six thousand, four hundred three".