1216841208 has 32 divisors (see below), whose sum is σ = 3318658560. Its totient is φ = 368739680.

The previous prime is 1216841207. The next prime is 1216841221. The reversal of 1216841208 is 8021486121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216841207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2304360 + ... + 2304887.

It is an arithmetic number, because the mean of its divisors is an integer number (103708080).

Almost surely, 2^1216841208 is an apocalyptic number.

It is an amenable number.

1216841208 is an abundant number, since it is smaller than the sum of its proper divisors (2101817352).

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

1216841208 is a wasteful number, since it uses less digits than its factorization.

1216841208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4609267 (or 4609263 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 1216841208 is about 34883.2511099525. The cubic root of 1216841208 is about 1067.6067300373.

The spelling of 1216841208 in words is "one billion, two hundred sixteen million, eight hundred forty-one thousand, two hundred eight".