404421629 has 4 divisors (see below), whose sum is σ = 417467520. Its totient is φ = 391375740.

The previous prime is 404421623. The next prime is 404421637. The reversal of 404421629 is 926124404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404421629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404421595 and 404421604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404421623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6522899 + ... + 6522960.

It is an arithmetic number, because the mean of its divisors is an integer number (104366880).

Almost surely, 2^404421629 is an apocalyptic number.

It is an amenable number.

404421629 is a deficient number, since it is larger than the sum of its proper divisors (13045891).

404421629 is a wasteful number, since it uses less digits than its factorization.

404421629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13045890.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 404421629 is about 20110.2369205338. The cubic root of 404421629 is about 739.5112605513.

The spelling of 404421629 in words is "four hundred four million, four hundred twenty-one thousand, six hundred twenty-nine".