1216667982 has 16 divisors (see below), whose sum is σ = 2442591360. Its totient is φ = 404013432.

The previous prime is 1216667971. The next prime is 1216668029. The reversal of 1216667982 is 2897666121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383932 + ... + 387087.

It is an arithmetic number, because the mean of its divisors is an integer number (152661960).

Almost surely, 2^1216667982 is an apocalyptic number.

1216667982 is an abundant number, since it is smaller than the sum of its proper divisors (1225923378).

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

1216667982 is a wasteful number, since it uses less digits than its factorization.

1216667982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771287.

The product of its digits is 435456, while the sum is 48.

The square root of 1216667982 is about 34880.7680821395. The cubic root of 1216667982 is about 1067.5560671629.

The spelling of 1216667982 in words is "one billion, two hundred sixteen million, six hundred sixty-seven thousand, nine hundred eighty-two".