405805050 has 144 divisors (see below), whose sum is σ = 1272989952. Its totient is φ = 90748800.

The previous prime is 405805039. The next prime is 405805051. The reversal of 405805050 is 50508504.

It is not an unprimeable number, because it can be changed into a prime (405805051) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 146680 + ... + 149420.

It is an arithmetic number, because the mean of its divisors is an integer number (8840208).

Almost surely, 2^405805050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405805050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (636494976).

405805050 is an abundant number, since it is smaller than the sum of its proper divisors (867184902).

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

405805050 is a wasteful number, since it uses less digits than its factorization.

405805050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813 (or 2805 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 405805050 is about 20144.6034957256. The cubic root of 405805050 is about 740.3535259915.

The spelling of 405805050 in words is "four hundred five million, eight hundred five thousand, fifty".