404706469 has 4 divisors (see below), whose sum is σ = 405230796. Its totient is φ = 404182144.

The previous prime is 404706451. The next prime is 404706473. The reversal of 404706469 is 964607404.

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 55502500 + 349203969 = 7450^2 + 18687^2 .

It is a cyclic number.

It is not a de Polignac number, because 404706469 - 2²⁷ = 270488741 is a prime.

It is a super-2 number, since 2×404706469² = 327574652100895922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404701469) 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, 261004 + ... + 262549.

It is an arithmetic number, because the mean of its divisors is an integer number (101307699).

Almost surely, 2^404706469 is an apocalyptic number.

It is an amenable number.

404706469 is a deficient number, since it is larger than the sum of its proper divisors (524327).

404706469 is an equidigital number, since it uses as much as digits as its factorization.

404706469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524326.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 404706469 is about 20117.3176392878. The cubic root of 404706469 is about 739.6848359644.

The spelling of 404706469 in words is "four hundred four million, seven hundred six thousand, four hundred sixty-nine".