405821032 has 16 divisors (see below), whose sum is σ = 781480260. Its totient is φ = 197426304.

The previous prime is 405821029. The next prime is 405821033. The reversal of 405821032 is 230128504.

It can be written as a sum of positive squares in 2 ways, for example, as 377369476 + 28451556 = 19426^2 + 5334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 405820988 and 405821006.

It is not an unprimeable number, because it can be changed into a prime (405821033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685213 + ... + 685804.

Almost surely, 2^405821032 is an apocalyptic number.

It is an amenable number.

405821032 is a deficient number, since it is larger than the sum of its proper divisors (375659228).

405821032 is a wasteful number, since it uses less digits than its factorization.

405821032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371060 (or 1371056 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 405821032 is about 20145.0001737404. Note that the first 3 decimals coincide. The cubic root of 405821032 is about 740.3632450875.

Adding to 405821032 its reverse (230128504), we get a palindrome (635949536).

It can be divided in two parts, 40582 and 1032, that added together give a palindrome (41614).

The spelling of 405821032 in words is "four hundred five million, eight hundred twenty-one thousand, thirty-two".