405445452 has 48 divisors (see below), whose sum is σ = 971131392. Its totient is φ = 131584320.

The previous prime is 405445421. The next prime is 405445471. The reversal of 405445452 is 254544504.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 188302 + ... + 190442.

It is an arithmetic number, because the mean of its divisors is an integer number (20231904).

Almost surely, 2^405445452 is an apocalyptic number.

It is an amenable number.

405445452 is an abundant number, since it is smaller than the sum of its proper divisors (565685940).

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

405445452 is a wasteful number, since it uses less digits than its factorization.

405445452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558 (or 2556 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 33.

The square root of 405445452 is about 20135.6760998979. The cubic root of 405445452 is about 740.1347770097.

Adding to 405445452 its reverse (254544504), we get a palindrome (659989956).

The spelling of 405445452 in words is "four hundred five million, four hundred forty-five thousand, four hundred fifty-two".