1216437608 has 32 divisors (see below), whose sum is σ = 2404015200. Its totient is φ = 575451072.

The previous prime is 1216437587. The next prime is 1216437643. The reversal of 1216437608 is 8067346121.

It is a Harshad number since it is a multiple of its sum of digits (38).

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, 120866 + ... + 130542.

It is an arithmetic number, because the mean of its divisors is an integer number (75125475).

Almost surely, 2^1216437608 is an apocalyptic number.

It is an amenable number.

1216437608 is a deficient number, since it is larger than the sum of its proper divisors (1187577592).

1216437608 is a wasteful number, since it uses less digits than its factorization.

1216437608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10529 (or 10525 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1216437608 is about 34877.4656189351. The cubic root of 1216437608 is about 1067.4886829383.

The spelling of 1216437608 in words is "one billion, two hundred sixteen million, four hundred thirty-seven thousand, six hundred eight".