418816385 has 8 divisors (see below), whose sum is σ = 541239720. Its totient is φ = 309279744.

The previous prime is 418816381. The next prime is 418816399. The reversal of 418816385 is 583618814.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 71031184 + 347785201 = 8428^2 + 18649^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 418816385 - 2² = 418816381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (418816381) 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 7 ways as a sum of consecutive naturals, for example, 3221600 + ... + 3221729.

It is an arithmetic number, because the mean of its divisors is an integer number (67654965).

Almost surely, 2^418816385 is an apocalyptic number.

It is an amenable number.

418816385 is a deficient number, since it is larger than the sum of its proper divisors (122423335).

418816385 is a wasteful number, since it uses less digits than its factorization.

418816385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443347.

The product of its digits is 184320, while the sum is 44.

The square root of 418816385 is about 20465.0039091127. The cubic root of 418816385 is about 748.1830894096.

The spelling of 418816385 in words is "four hundred eighteen million, eight hundred sixteen thousand, three hundred eighty-five".