404397 has 24 divisors (see below), whose sum is σ = 686400. Its totient is φ = 229320.

The previous prime is 404389. The next prime is 404399. The reversal of 404397 is 793404.

It is not a de Polignac number, because 404397 - 2³ = 404389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3022 + ... + 3152.

It is an arithmetic number, because the mean of its divisors is an integer number (28600).

2⁴⁰⁴³⁹⁷ is an apocalyptic number.

It is an amenable number.

404397 is a deficient number, since it is larger than the sum of its proper divisors (282003).

404397 is a wasteful number, since it uses less digits than its factorization.

404397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 404397 is about 635.9221650485. The cubic root of 404397 is about 73.9496248337.

The spelling of 404397 in words is "four hundred four thousand, three hundred ninety-seven".