396404 has 12 divisors (see below), whose sum is σ = 700644. Its totient is φ = 196224.

The previous prime is 396379. The next prime is 396413. The reversal of 396404 is 404693.

It can be written as a sum of positive squares in 2 ways, for example, as 144400 + 252004 = 380^2 + 502^2 .

It is a super-2 number, since 2×396404² = 314272262432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

396404 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14 + ... + 890.

It is an arithmetic number, because the mean of its divisors is an integer number (58387).

2³⁹⁶⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

396404 is a deficient number, since it is larger than the sum of its proper divisors (304240).

396404 is a wasteful number, since it uses less digits than its factorization.

396404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 396404 is about 629.6062261446. The cubic root of 396404 is about 73.4591687076.

The spelling of 396404 in words is "three hundred ninety-six thousand, four hundred four".