404549 has 8 divisors (see below), whose sum is σ = 437400. Its totient is φ = 372736.

The previous prime is 404539. The next prime is 404557. The reversal of 404549 is 945404.

It can be written as a sum of positive squares in 4 ways, for example, as 172225 + 232324 = 415^2 + 482^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404549 - 2⁴ = 404533 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 (404539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677 + ... + 1125.

It is an arithmetic number, because the mean of its divisors is an integer number (54675).

2⁴⁰⁴⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

404549 is a deficient number, since it is larger than the sum of its proper divisors (32851).

404549 is a wasteful number, since it uses less digits than its factorization.

404549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 404549 is about 636.0416653019. The cubic root of 404549 is about 73.9588887789.

The spelling of 404549 in words is "four hundred four thousand, five hundred forty-nine".