1216324478 has 8 divisors (see below), whose sum is σ = 1824654168. Its totient is φ = 608106424.

The previous prime is 1216324469. The next prime is 1216324489. The reversal of 1216324478 is 8744236121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9200 + ... + 50172.

It is an arithmetic number, because the mean of its divisors is an integer number (228081771).

Almost surely, 2^1216324478 is an apocalyptic number.

1216324478 is a deficient number, since it is larger than the sum of its proper divisors (608329690).

1216324478 is a wasteful number, since it uses less digits than its factorization.

1216324478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55818.

The product of its digits is 64512, while the sum is 38.

The square root of 1216324478 is about 34875.8437604024. The cubic root of 1216324478 is about 1067.4555893822.

The spelling of 1216324478 in words is "one billion, two hundred sixteen million, three hundred twenty-four thousand, four hundred seventy-eight".