813985450 has 12 divisors (see below), whose sum is σ = 1514013030. Its totient is φ = 325594160.

The previous prime is 813985411. The next prime is 813985499. The reversal of 813985450 is 54589318.

It can be written as a sum of positive squares in 3 ways, for example, as 784728169 + 29257281 = 28013^2 + 5409^2 .

It is a junction number, because it is equal to n+sod(n) for n = 813985397 and 813985406.

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 5 ways as a sum of consecutive naturals, for example, 8139805 + ... + 8139904.

Almost surely, 2^813985450 is an apocalyptic number.

813985450 is a deficient number, since it is larger than the sum of its proper divisors (700027580).

813985450 is a wasteful number, since it uses less digits than its factorization.

813985450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16279721 (or 16279716 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 813985450 is about 28530.4302456167. The cubic root of 813985450 is about 933.6961054348.

The spelling of 813985450 in words is "eight hundred thirteen million, nine hundred eighty-five thousand, four hundred fifty".