1209718216 has 32 divisors (see below), whose sum is σ = 2641170240. Its totient is φ = 508667328.

The previous prime is 1209718199. The next prime is 1209718217. The reversal of 1209718216 is 6128179021.

It is not an unprimeable number, because it can be changed into a prime (1209718217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200826 + ... + 206761.

It is an arithmetic number, because the mean of its divisors is an integer number (82536570).

Almost surely, 2^1209718216 is an apocalyptic number.

It is an amenable number.

1209718216 is an abundant number, since it is smaller than the sum of its proper divisors (1431452024).

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

1209718216 is a wasteful number, since it uses less digits than its factorization.

1209718216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407653 (or 407649 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 1209718216 is about 34781.0036657943. The cubic root of 1209718216 is about 1065.5195114298.

The spelling of 1209718216 in words is "one billion, two hundred nine million, seven hundred eighteen thousand, two hundred sixteen".