1216865024 has 36 divisors (see below), whose sum is σ = 2463224400. Its totient is φ = 599854080.

The previous prime is 1216865017. The next prime is 1216865033. The reversal of 1216865024 is 4205686121.

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 3 ways as a sum of consecutive naturals, for example, 15299 + ... + 51650.

It is an arithmetic number, because the mean of its divisors is an integer number (68422900).

Almost surely, 2^1216865024 is an apocalyptic number.

It is an amenable number.

1216865024 is an abundant number, since it is smaller than the sum of its proper divisors (1246359376).

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

1216865024 is an frugal number, since it uses more digits than its factorization.

1216865024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67036 (or 67022 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 1216865024 is about 34883.5924755464. The cubic root of 1216865024 is about 1067.6136950534.

The spelling of 1216865024 in words is "one billion, two hundred sixteen million, eight hundred sixty-five thousand, twenty-four".