440361909 has 12 divisors (see below), whose sum is σ = 685007596. Its totient is φ = 270991872.

The previous prime is 440361907. The next prime is 440361923. The reversal of 440361909 is 909163044.

It can be written as a sum of positive squares in 2 ways, for example, as 250335684 + 190026225 = 15822^2 + 13785^2 .

It is not a de Polignac number, because 440361909 - 2¹ = 440361907 is a prime.

It is a super-2 number, since 2×440361909² = 387837221796248562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440361907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1881772 + ... + 1882005.

Almost surely, 2^440361909 is an apocalyptic number.

It is an amenable number.

440361909 is a deficient number, since it is larger than the sum of its proper divisors (244645687).

440361909 is a wasteful number, since it uses less digits than its factorization.

440361909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3763796 (or 3763793 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 440361909 is about 20984.8018575349. The cubic root of 440361909 is about 760.7989687497.

The spelling of 440361909 in words is "four hundred forty million, three hundred sixty-one thousand, nine hundred nine".