440661813 has 8 divisors (see below), whose sum is σ = 618472800. Its totient is φ = 278312688.

The previous prime is 440661803. The next prime is 440661829. The reversal of 440661813 is 318166044.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 440661813 - 2¹⁸ = 440399669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440661803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3865398 + ... + 3865511.

It is an arithmetic number, because the mean of its divisors is an integer number (77309100).

Almost surely, 2^440661813 is an apocalyptic number.

It is an amenable number.

440661813 is a deficient number, since it is larger than the sum of its proper divisors (177810987).

440661813 is a wasteful number, since it uses less digits than its factorization.

440661813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7730931.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 440661813 is about 20991.9463842684. The cubic root of 440661813 is about 760.9716410238.

The spelling of 440661813 in words is "four hundred forty million, six hundred sixty-one thousand, eight hundred thirteen".