1216593312 has 48 divisors (see below), whose sum is σ = 3483883872. Its totient is φ = 368664320.

The previous prime is 1216593293. The next prime is 1216593341. The reversal of 1216593312 is 2133956121.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

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, 574983 + ... + 577094.

It is an arithmetic number, because the mean of its divisors is an integer number (72580914).

Almost surely, 2^1216593312 is an apocalyptic number.

1216593312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1216593312 is an abundant number, since it is smaller than the sum of its proper divisors (2267290560).

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

1216593312 is a wasteful number, since it uses less digits than its factorization.

1216593312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152101 (or 1152093 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 1216593312 is about 34879.6977051121. The cubic root of 1216593312 is about 1067.5342271749.

The spelling of 1216593312 in words is "one billion, two hundred sixteen million, five hundred ninety-three thousand, three hundred twelve".