404628229 has 2 divisors, whose sum is σ = 404628230. Its totient is φ = 404628228.

The previous prime is 404628197. The next prime is 404628233. The reversal of 404628229 is 922826404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204547204 + 200081025 = 14302^2 + 14145^2 .

It is a cyclic number.

It is not a de Polignac number, because 404628229 - 2⁵ = 404628197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404628529) 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 as a sum of consecutive naturals, namely, 202314114 + 202314115.

It is an arithmetic number, because the mean of its divisors is an integer number (202314115).

Almost surely, 2^404628229 is an apocalyptic number.

It is an amenable number.

404628229 is a deficient number, since it is larger than the sum of its proper divisors (1).

404628229 is an equidigital number, since it uses as much as digits as its factorization.

404628229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 404628229 is about 20115.3729520484. The cubic root of 404628229 is about 739.6371662945.

The spelling of 404628229 in words is "four hundred four million, six hundred twenty-eight thousand, two hundred twenty-nine".