813420450 has 72 divisors (see below), whose sum is σ = 2195292528. Its totient is φ = 215929440.

The previous prime is 813420409. The next prime is 813420451. The reversal of 813420450 is 54024318.

It is not an unprimeable number, because it can be changed into a prime (813420451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 98169 + ... + 106131.

It is an arithmetic number, because the mean of its divisors is an integer number (30490174).

Almost surely, 2^813420450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813420450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097646264).

813420450 is an abundant number, since it is smaller than the sum of its proper divisors (1381872078).

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

813420450 is a wasteful number, since it uses less digits than its factorization.

813420450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8208 (or 8200 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 813420450 is about 28520.5268184162. The cubic root of 813420450 is about 933.4800244208.

Adding to 813420450 its reverse (54024318), we get a palindrome (867444768).

The spelling of 813420450 in words is "eight hundred thirteen million, four hundred twenty thousand, four hundred fifty".