405240450 has 72 divisors (see below), whose sum is σ = 1050797328. Its totient is φ = 103345440.

The previous prime is 405240443. The next prime is 405240469. The reversal of 405240450 is 54042504.

It is a self number, because there is not a number n which added to its sum of digits gives 405240450.

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 35 ways as a sum of consecutive naturals, for example, 76797 + ... + 81903.

Almost surely, 2^405240450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405240450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (525398664).

405240450 is an abundant number, since it is smaller than the sum of its proper divisors (645556878).

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

405240450 is a wasteful number, since it uses less digits than its factorization.

405240450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168 (or 5140 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 405240450 is about 20130.5849393404. The cubic root of 405240450 is about 740.0100132563.

Adding to 405240450 its reverse (54042504), we get a palindrome (459282954).

The spelling of 405240450 in words is "four hundred five million, two hundred forty thousand, four hundred fifty".