404731 has 4 divisors (see below), whose sum is σ = 422352. Its totient is φ = 387112.

The previous prime is 404713. The next prime is 404773. The reversal of 404731 is 137404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 404731 - 2⁵ = 404699 is a prime.

It is a super-2 number, since 2×404731² = 327614364722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404699 and 404708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404431) 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, 8776 + ... + 8821.

It is an arithmetic number, because the mean of its divisors is an integer number (105588).

2⁴⁰⁴⁷³¹ is an apocalyptic number.

404731 is a deficient number, since it is larger than the sum of its proper divisors (17621).

404731 is a wasteful number, since it uses less digits than its factorization.

404731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17620.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 404731 is about 636.1847216021. The cubic root of 404731 is about 73.9699780822.

The spelling of 404731 in words is "four hundred four thousand, seven hundred thirty-one".