8144485220 has 24 divisors (see below), whose sum is σ = 17147403000. Its totient is φ = 3249416192.

The previous prime is 8144485207. The next prime is 8144485229. The reversal of 8144485220 is 225844418.

It can be written as a sum of positive squares in 4 ways, for example, as 149621824 + 7994863396 = 12232^2 + 89414^2 .

It is not an unprimeable number, because it can be changed into a prime (8144485229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515645 + ... + 531204.

It is an arithmetic number, because the mean of its divisors is an integer number (714475125).

Almost surely, 2^8144485220 is an apocalyptic number.

It is an amenable number.

8144485220 is an abundant number, since it is smaller than the sum of its proper divisors (9002917780).

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

8144485220 is a wasteful number, since it uses less digits than its factorization.

8144485220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047247 (or 1047245 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 38.

The square root of 8144485220 is about 90246.8017161827. The cubic root of 8144485220 is about 2011.9686676227.

The spelling of 8144485220 in words is "eight billion, one hundred forty-four million, four hundred eighty-five thousand, two hundred twenty".