404544261 has 12 divisors (see below), whose sum is σ = 592886336. Its totient is φ = 245178120.

The previous prime is 404544167. The next prime is 404544269. The reversal of 404544261 is 162445404.

It is a happy number.

It is not a de Polignac number, because 404544261 - 2²¹ = 402447109 is a prime.

It is a super-2 number, since 2×404544261² = 327312118216072242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404544269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 556861 + ... + 557586.

Almost surely, 2^404544261 is an apocalyptic number.

It is an amenable number.

404544261 is a deficient number, since it is larger than the sum of its proper divisors (188342075).

404544261 is a wasteful number, since it uses less digits than its factorization.

404544261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114472 (or 1114461 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 404544261 is about 20113.2856838459. The cubic root of 404544261 is about 739.5859998610.

Adding to 404544261 its reverse (162445404), we get a palindrome (566989665).

The spelling of 404544261 in words is "four hundred four million, five hundred forty-four thousand, two hundred sixty-one".