1216220596 has 24 divisors (see below), whose sum is σ = 2267959176. Its totient is φ = 568688640.

The previous prime is 1216220567. The next prime is 1216220633. The reversal of 1216220596 is 6950226121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 119683600 + 1096536996 = 10940^2 + 33114^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 46285 + ... + 67636.

It is an arithmetic number, because the mean of its divisors is an integer number (94498299).

Almost surely, 2^1216220596 is an apocalyptic number.

It is an amenable number.

1216220596 is a deficient number, since it is larger than the sum of its proper divisors (1051738580).

1216220596 is a wasteful number, since it uses less digits than its factorization.

1216220596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114099 (or 114097 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1216220596 is about 34874.3544169638. The cubic root of 1216220596 is about 1067.4251993066.

The spelling of 1216220596 in words is "one billion, two hundred sixteen million, two hundred twenty thousand, five hundred ninety-six".