404739229 has 4 divisors (see below), whose sum is σ = 410283676. Its totient is φ = 399194784.

The previous prime is 404739191. The next prime is 404739241. The reversal of 404739229 is 922937404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 104652900 + 300086329 = 10230^2 + 17323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404739229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404739191 and 404739200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404739289) 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, 2772114 + ... + 2772259.

It is an arithmetic number, because the mean of its divisors is an integer number (102570919).

Almost surely, 2^404739229 is an apocalyptic number.

It is an amenable number.

404739229 is a deficient number, since it is larger than the sum of its proper divisors (5544447).

404739229 is an equidigital number, since it uses as much as digits as its factorization.

404739229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5544446.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 404739229 is about 20118.1318466701. The cubic root of 404739229 is about 739.7047939861.

The spelling of 404739229 in words is "four hundred four million, seven hundred thirty-nine thousand, two hundred twenty-nine".