404400463 has 4 divisors (see below), whose sum is σ = 404497800. Its totient is φ = 404303128.

The previous prime is 404400449. The next prime is 404400473. The reversal of 404400463 is 364004404.

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 404400463 - 2⁹ = 404399951 is a prime.

It is a super-3 number, since 3×404400463³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404400433) 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, 42145 + ... + 50842.

It is an arithmetic number, because the mean of its divisors is an integer number (101124450).

Almost surely, 2^404400463 is an apocalyptic number.

404400463 is a deficient number, since it is larger than the sum of its proper divisors (97337).

404400463 is an equidigital number, since it uses as much as digits as its factorization.

404400463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97336.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 404400463 is about 20109.7106642537. The cubic root of 404400463 is about 739.4983591902.

Adding to 404400463 its reverse (364004404), we get a palindrome (768404867).

The spelling of 404400463 in words is "four hundred four million, four hundred thousand, four hundred sixty-three".