816726220 has 12 divisors (see below), whose sum is σ = 1715125104. Its totient is φ = 326690480.

The previous prime is 816726199. The next prime is 816726227. The reversal of 816726220 is 22627618.

It is not an unprimeable number, because it can be changed into a prime (816726227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20418136 + ... + 20418175.

It is an arithmetic number, because the mean of its divisors is an integer number (142927092).

Almost surely, 2^816726220 is an apocalyptic number.

It is an amenable number.

816726220 is an abundant number, since it is smaller than the sum of its proper divisors (898398884).

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

816726220 is a wasteful number, since it uses less digits than its factorization.

816726220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40836320 (or 40836318 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 816726220 is about 28578.4222797551. The cubic root of 816726220 is about 934.7428806762.

The spelling of 816726220 in words is "eight hundred sixteen million, seven hundred twenty-six thousand, two hundred twenty".