1216580936 has 16 divisors (see below), whose sum is σ = 2290181040. Its totient is φ = 605866000.

The previous prime is 1216580933. The next prime is 1216580941. The reversal of 1216580936 is 6390856121.

It is a junction number, because it is equal to n+sod(n) for n = 1216580893 and 1216580902.

It is not an unprimeable number, because it can be changed into a prime (1216580933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300926 + ... + 304941.

It is an arithmetic number, because the mean of its divisors is an integer number (143136315).

Almost surely, 2^1216580936 is an apocalyptic number.

It is an amenable number.

1216580936 is a deficient number, since it is larger than the sum of its proper divisors (1073600104).

1216580936 is a wasteful number, since it uses less digits than its factorization.

1216580936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606124 (or 606120 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1216580936 is about 34879.5202948664. The cubic root of 1216580936 is about 1067.5306072722.

The spelling of 1216580936 in words is "one billion, two hundred sixteen million, five hundred eighty thousand, nine hundred thirty-six".