41217878728 has 16 divisors (see below), whose sum is σ = 83228409180. Its totient is φ = 19023636288.

The previous prime is 41217878719. The next prime is 41217878729. The reversal of 41217878728 is 82787871214.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35202014884 + 6015863844 = 187622^2 + 77562^2 .

It is a super-2 number, since 2×41217878728² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (41217878729) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 198162775 + ... + 198162982.

Almost surely, 2^41217878728 is an apocalyptic number.

It is an amenable number.

41217878728 is an abundant number, since it is smaller than the sum of its proper divisors (42010530452).

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

41217878728 is a wasteful number, since it uses less digits than its factorization.

41217878728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396325776 (or 396325772 counting only the distinct ones).

The product of its digits is 2809856, while the sum is 55.

The spelling of 41217878728 in words is "forty-one billion, two hundred seventeen million, eight hundred seventy-eight thousand, seven hundred twenty-eight".