405004172 has 12 divisors (see below), whose sum is σ = 709968840. Its totient is φ = 202155936.

The previous prime is 405004153. The next prime is 405004177. The reversal of 405004172 is 271400504.

It is not an unprimeable number, because it can be changed into a prime (405004177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83897 + ... + 88592.

It is an arithmetic number, because the mean of its divisors is an integer number (59164070).

Almost surely, 2^405004172 is an apocalyptic number.

It is an amenable number.

405004172 is a deficient number, since it is larger than the sum of its proper divisors (304964668).

405004172 is a wasteful number, since it uses less digits than its factorization.

405004172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173080 (or 173078 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 405004172 is about 20124.7154514045. The cubic root of 405004172 is about 739.8661627933.

Adding to 405004172 its reverse (271400504), we get a palindrome (676404676).

The spelling of 405004172 in words is "four hundred five million, four thousand, one hundred seventy-two".