404242229 has 4 divisors (see below), whose sum is σ = 404306784. Its totient is φ = 404177676.

The previous prime is 404242219. The next prime is 404242243. The reversal of 404242229 is 922242404.

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 404242229 - 2⁴ = 404242213 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 (404242219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21737 + ... + 35790.

It is an arithmetic number, because the mean of its divisors is an integer number (101076696).

Almost surely, 2^404242229 is an apocalyptic number.

It is an amenable number.

404242229 is a deficient number, since it is larger than the sum of its proper divisors (64555).

404242229 is an equidigital number, since it uses as much as digits as its factorization.

404242229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64554.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 404242229 is about 20105.7760108880. The cubic root of 404242229 is about 739.4018961879.

The spelling of 404242229 in words is "four hundred four million, two hundred forty-two thousand, two hundred twenty-nine".