845205450 has 48 divisors (see below), whose sum is σ = 2112159456. Its totient is φ = 223662400.

The previous prime is 845205379. The next prime is 845205509. The reversal of 845205450 is 54502548.

845205450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1857 + ... + 41156.

It is an arithmetic number, because the mean of its divisors is an integer number (44003322).

Almost surely, 2^845205450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 845205450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1056079728).

845205450 is an abundant number, since it is smaller than the sum of its proper divisors (1266954006).

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

845205450 is a wasteful number, since it uses less digits than its factorization.

845205450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43159 (or 43154 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

The square root of 845205450 is about 29072.4173401525. The cubic root of 845205450 is about 945.4838092604.

Adding to 845205450 its reverse (54502548), we get a palindrome (899707998).

The spelling of 845205450 in words is "eight hundred forty-five million, two hundred five thousand, four hundred fifty".