404718643 has 16 divisors (see below), whose sum is σ = 496463040. Its totient is φ = 322016256.

The previous prime is 404718641. The next prime is 404718661. The reversal of 404718643 is 346817404.

It is a cyclic number.

It is not a de Polignac number, because 404718643 - 2¹ = 404718641 is a prime.

It is a super-2 number, since 2×404718643² = 327594359983522898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404718641) 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 15 ways as a sum of consecutive naturals, for example, 14608 + ... + 31981.

It is an arithmetic number, because the mean of its divisors is an integer number (31028940).

Almost surely, 2^404718643 is an apocalyptic number.

404718643 is a deficient number, since it is larger than the sum of its proper divisors (91744397).

404718643 is a wasteful number, since it uses less digits than its factorization.

404718643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46686.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 404718643 is about 20117.6202121424. The cubic root of 404718643 is about 739.6922527249.

The spelling of 404718643 in words is "four hundred four million, seven hundred eighteen thousand, six hundred forty-three".