404224399 has 4 divisors (see below), whose sum is σ = 411075720. Its totient is φ = 397373080.

The previous prime is 404224397. The next prime is 404224439. The reversal of 404224399 is 993422404.

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 404224399 - 2¹ = 404224397 is a prime.

It is a super-2 number, since 2×404224399² = 326794729493822402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404224397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3425572 + ... + 3425689.

It is an arithmetic number, because the mean of its divisors is an integer number (102768930).

Almost surely, 2^404224399 is an apocalyptic number.

404224399 is a deficient number, since it is larger than the sum of its proper divisors (6851321).

404224399 is an equidigital number, since it uses as much as digits as its factorization.

404224399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6851320.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 404224399 is about 20105.3326010787. The cubic root of 404224399 is about 739.3910250412.

It can be divided in two parts, 4042 and 24399, that added together give a triangular number (28441 = T₂₃₈).

The spelling of 404224399 in words is "four hundred four million, two hundred twenty-four thousand, three hundred ninety-nine".