404247629 has 4 divisors (see below), whose sum is σ = 425523840. Its totient is φ = 382971420.

The previous prime is 404247587. The next prime is 404247631. The reversal of 404247629 is 926742404.

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 not a de Polignac number, because 404247629 - 2⁸ = 404247373 is a prime.

It is a super-2 number, since 2×404247629² = 326832291104243282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404247592 and 404247601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404237629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10638077 + ... + 10638114.

It is an arithmetic number, because the mean of its divisors is an integer number (106380960).

Almost surely, 2^404247629 is an apocalyptic number.

It is an amenable number.

404247629 is a deficient number, since it is larger than the sum of its proper divisors (21276211).

404247629 is a wasteful number, since it uses less digits than its factorization.

404247629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21276210.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 404247629 is about 20105.9103002077. The cubic root of 404247629 is about 739.4051885640.

The spelling of 404247629 in words is "four hundred four million, two hundred forty-seven thousand, six hundred twenty-nine".