1216367292 has 48 divisors (see below), whose sum is σ = 3261807360. Its totient is φ = 345587712.

The previous prime is 1216367287. The next prime is 1216367309. The reversal of 1216367292 is 2927636121.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 1216367292.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 25413 + ... + 55484.

It is an arithmetic number, because the mean of its divisors is an integer number (67954320).

Almost surely, 2^1216367292 is an apocalyptic number.

1216367292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1216367292 is an abundant number, since it is smaller than the sum of its proper divisors (2045440068).

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

1216367292 is a wasteful number, since it uses less digits than its factorization.

1216367292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81090 (or 81088 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 1216367292 is about 34876.4575609393. The cubic root of 1216367292 is about 1067.4681138657.

The spelling of 1216367292 in words is "one billion, two hundred sixteen million, three hundred sixty-seven thousand, two hundred ninety-two".