8212195940 has 24 divisors (see below), whose sum is σ = 18572197560. Its totient is φ = 3032195328.

The previous prime is 8212195921. The next prime is 8212195951. The reversal of 8212195940 is 495912128.

It can be written as a sum of positive squares in 4 ways, for example, as 151388416 + 8060807524 = 12304^2 + 89782^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15792425 + ... + 15792944.

It is an arithmetic number, because the mean of its divisors is an integer number (773841565).

Almost surely, 2^8212195940 is an apocalyptic number.

It is an amenable number.

8212195940 is an abundant number, since it is smaller than the sum of its proper divisors (10360001620).

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

8212195940 is a wasteful number, since it uses less digits than its factorization.

8212195940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31585391 (or 31585389 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 8212195940 is about 90621.1671741211. The cubic root of 8212195940 is about 2017.5289147420.

The spelling of 8212195940 in words is "eight billion, two hundred twelve million, one hundred ninety-five thousand, nine hundred forty".