1216368 has 30 divisors (see below), whose sum is σ = 3404544. Its totient is φ = 405408.

The previous prime is 1216351. The next prime is 1216373. The reversal of 1216368 is 8636121.

1216368 is a `hidden beast` number, since 1 + 21 + 636 + 8 = 666.

It is a super-2 number, since 2×1216368² = 2959102222848, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4080 + ... + 4367.

2^1216368 is an apocalyptic number.

1216368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1216368 is an abundant number, since it is smaller than the sum of its proper divisors (2188176).

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

1216368 is a wasteful number, since it uses less digits than its factorization.

1216368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8461 (or 8452 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1216368 is about 1102.8907470824. The cubic root of 1216368 is about 106.7468320976.

The spelling of 1216368 in words is "one million, two hundred sixteen thousand, three hundred sixty-eight".