404023164 has 12 divisors (see below), whose sum is σ = 942720744. Its totient is φ = 134674384.

The previous prime is 404023153. The next prime is 404023171. The reversal of 404023164 is 461320404.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16834287 + ... + 16834310.

It is an arithmetic number, because the mean of its divisors is an integer number (78560062).

Almost surely, 2^404023164 is an apocalyptic number.

It is an amenable number.

404023164 is an abundant number, since it is smaller than the sum of its proper divisors (538697580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404023164 is a wasteful number, since it uses less digits than its factorization.

404023164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33668604 (or 33668602 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 404023164 is about 20100.3274600192. The cubic root of 404023164 is about 739.2683076834.

Adding to 404023164 its reverse (461320404), we get a palindrome (865343568).

It can be divided in two parts, 40 and 4023164, that added together give a palindrome (4023204).

The spelling of 404023164 in words is "four hundred four million, twenty-three thousand, one hundred sixty-four".