404642415 has 32 divisors (see below), whose sum is σ = 686776320. Its totient is φ = 202740224.

The previous prime is 404642393. The next prime is 404642453. The reversal of 404642415 is 514246404.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 404642415 - 2⁵ = 404642383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 182242 + ... + 184448.

It is an arithmetic number, because the mean of its divisors is an integer number (21461760).

Almost surely, 2^404642415 is an apocalyptic number.

404642415 is a deficient number, since it is larger than the sum of its proper divisors (282133905).

404642415 is a wasteful number, since it uses less digits than its factorization.

404642415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951.

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 404642415 is about 20115.7255648411. The cubic root of 404642415 is about 739.6458099246.

Adding to 404642415 its reverse (514246404), we get a palindrome (918888819).

The spelling of 404642415 in words is "four hundred four million, six hundred forty-two thousand, four hundred fifteen".