405452172 has 24 divisors (see below), whose sum is σ = 995848000. Its totient is φ = 128037456.

The previous prime is 405452171. The next prime is 405452183. The reversal of 405452172 is 271254504.

It is not an unprimeable number, because it can be changed into a prime (405452171) 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 7 ways as a sum of consecutive naturals, for example, 888922 + ... + 889377.

Almost surely, 2^405452172 is an apocalyptic number.

It is an amenable number.

405452172 is an abundant number, since it is smaller than the sum of its proper divisors (590395828).

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

405452172 is a wasteful number, since it uses less digits than its factorization.

405452172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778325 (or 1778323 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 405452172 is about 20135.8429672065. The cubic root of 405452172 is about 740.1388660746.

The spelling of 405452172 in words is "four hundred five million, four hundred fifty-two thousand, one hundred seventy-two".