404440413 has 16 divisors (see below), whose sum is σ = 594242880. Its totient is φ = 243097344.

The previous prime is 404440397. The next prime is 404440417. The reversal of 404440413 is 314044404.

It is not a de Polignac number, because 404440413 - 2⁴ = 404440397 is a prime.

It is a super-2 number, since 2×404440413² = 327144095335221138, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404440417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118908 + ... + 122261.

It is an arithmetic number, because the mean of its divisors is an integer number (37140180).

Almost surely, 2^404440413 is an apocalyptic number.

404440413 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

404440413 is a deficient number, since it is larger than the sum of its proper divisors (189802467).

404440413 is a wasteful number, since it uses less digits than its factorization.

404440413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241228.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 404440413 is about 20110.7039409365. The cubic root of 404440413 is about 739.5227096294.

Adding to 404440413 its reverse (314044404), we get a palindrome (718484817).

The spelling of 404440413 in words is "four hundred four million, four hundred forty thousand, four hundred thirteen".