404640214 has 24 divisors (see below), whose sum is σ = 685201104. Its totient is φ = 178952400.

The previous prime is 404640209. The next prime is 404640227. The reversal of 404640214 is 412046404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13642 + ... + 31549.

It is an arithmetic number, because the mean of its divisors is an integer number (28550046).

Almost surely, 2^404640214 is an apocalyptic number.

404640214 is a deficient number, since it is larger than the sum of its proper divisors (280560890).

404640214 is a wasteful number, since it uses less digits than its factorization.

404640214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45252 (or 45241 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 404640214 is about 20115.6708563249. The cubic root of 404640214 is about 739.6444688529.

Adding to 404640214 its reverse (412046404), we get a palindrome (816686618).

The spelling of 404640214 in words is "four hundred four million, six hundred forty thousand, two hundred fourteen".