405020132 has 48 divisors (see below), whose sum is σ = 795614400. Its totient is φ = 178844160.

The previous prime is 405020113. The next prime is 405020141. The reversal of 405020132 is 231020504.

It is a self number, because there is not a number n which added to its sum of digits gives 405020132.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230168 + ... + 231920.

It is an arithmetic number, because the mean of its divisors is an integer number (16575300).

Almost surely, 2^405020132 is an apocalyptic number.

It is an amenable number.

405020132 is a deficient number, since it is larger than the sum of its proper divisors (390594268).

405020132 is a wasteful number, since it uses less digits than its factorization.

405020132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916 (or 1914 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 405020132 is about 20125.1119748438. Note that the first 3 decimals coincide. The cubic root of 405020132 is about 739.8758813013.

Adding to 405020132 its reverse (231020504), we get a palindrome (636040636).

The spelling of 405020132 in words is "four hundred five million, twenty thousand, one hundred thirty-two".