404420439 has 4 divisors (see below), whose sum is σ = 539227256. Its totient is φ = 269613624.

The previous prime is 404420381. The next prime is 404420503. The reversal of 404420439 is 934024404.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 404420439 - 2⁷ = 404420311 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 (404428439) 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, 67403404 + ... + 67403409.

It is an arithmetic number, because the mean of its divisors is an integer number (134806814).

Almost surely, 2^404420439 is an apocalyptic number.

404420439 is a deficient number, since it is larger than the sum of its proper divisors (134806817).

404420439 is a wasteful number, since it uses less digits than its factorization.

404420439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134806816.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 404420439 is about 20110.2073335906. The cubic root of 404420439 is about 739.5105352198.

The spelling of 404420439 in words is "four hundred four million, four hundred twenty thousand, four hundred thirty-nine".