7812308220 has 96 divisors (see below), whose sum is σ = 22226400000. Its totient is φ = 2050013184.

The previous prime is 7812308137. The next prime is 7812308221. The reversal of 7812308220 is 228032187.

It is a super-2 number, since 2×7812308220² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7812308221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1038031 + ... + 1045529.

It is an arithmetic number, because the mean of its divisors is an integer number (231525000).

Almost surely, 2^7812308220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7812308220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11113200000).

7812308220 is an abundant number, since it is smaller than the sum of its proper divisors (14414091780).

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

7812308220 is a wasteful number, since it uses less digits than its factorization.

7812308220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7787 (or 7785 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 7812308220 is about 88387.2627701526. The cubic root of 7812308220 is about 1984.2350784661.

The spelling of 7812308220 in words is "seven billion, eight hundred twelve million, three hundred eight thousand, two hundred twenty".