1216608 has 96 divisors (see below), whose sum is σ = 3628800. Its totient is φ = 354816.

The previous prime is 1216603. The next prime is 1216619. The reversal of 1216608 is 8066121.

It is a Cunningham number, because it is equal to 1103²-1.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41938 + ... + 41966.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2^1216608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814400).

1216608 is an abundant number, since it is smaller than the sum of its proper divisors (2412192).

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

1216608 is a wasteful number, since it uses less digits than its factorization.

1216608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1216608 is about 1102.9995466908. Note that the first 3 decimals coincide. The cubic root of 1216608 is about 106.7538523291.

The spelling of 1216608 in words is "one million, two hundred sixteen thousand, six hundred eight".