404279 has 4 divisors (see below), whose sum is σ = 405576. Its totient is φ = 402984.

The previous prime is 404273. The next prime is 404291. The reversal of 404279 is 972404.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404273) 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 3 ways as a sum of consecutive naturals, for example, 137 + ... + 909.

It is an arithmetic number, because the mean of its divisors is an integer number (101394).

2⁴⁰⁴²⁷⁹ is an apocalyptic number.

404279 is a deficient number, since it is larger than the sum of its proper divisors (1297).

404279 is an equidigital number, since it uses as much as digits as its factorization.

404279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 404279 is about 635.8293796295. The cubic root of 404279 is about 73.9424314861.

The spelling of 404279 in words is "four hundred four thousand, two hundred seventy-nine".