404481 has 32 divisors (see below), whose sum is σ = 718848. Its totient is φ = 195840.

The previous prime is 404461. The next prime is 404483. The reversal of 404481 is 184404.

It is not a de Polignac number, because 404481 - 2⁵ = 404449 is a prime.

It is a super-2 number, since 2×404481² = 327209758722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 404481.

It is not an unprimeable number, because it can be changed into a prime (404483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3876 + ... + 3978.

It is an arithmetic number, because the mean of its divisors is an integer number (22464).

It is a Proth number, since it is equal to 395 ⋅ 2¹⁰ + 1 and 395 < 2¹⁰.

2⁴⁰⁴⁴⁸¹ is an apocalyptic number.

It is an amenable number.

404481 is a deficient number, since it is larger than the sum of its proper divisors (314367).

404481 is a wasteful number, since it uses less digits than its factorization.

404481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 404481 is about 635.9882074378. The cubic root of 404481 is about 73.9547446693.

Adding to 404481 its reverse (184404), we get a palindrome (588885).

The spelling of 404481 in words is "four hundred four thousand, four hundred eighty-one".