812634220 has 24 divisors (see below), whose sum is σ = 1715382144. Its totient is φ = 323367936.

The previous prime is 812634197. The next prime is 812634241. The reversal of 812634220 is 22436218.

812634220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101404 + ... + 109123.

It is an arithmetic number, because the mean of its divisors is an integer number (71474256).

Almost surely, 2^812634220 is an apocalyptic number.

It is an amenable number.

812634220 is an abundant number, since it is smaller than the sum of its proper divisors (902747924).

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

812634220 is a wasteful number, since it uses less digits than its factorization.

812634220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210729 (or 210727 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 812634220 is about 28506.7399048015. The cubic root of 812634220 is about 933.1791686980.

The spelling of 812634220 in words is "eight hundred twelve million, six hundred thirty-four thousand, two hundred twenty".