1216160304 has 20 divisors (see below), whose sum is σ = 3141747576. Its totient is φ = 405386752.

The previous prime is 1216160293. The next prime is 1216160311. The reversal of 1216160304 is 4030616121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12668289 + ... + 12668384.

Almost surely, 2^1216160304 is an apocalyptic number.

It is an amenable number.

1216160304 is an abundant number, since it is smaller than the sum of its proper divisors (1925587272).

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

1216160304 is a wasteful number, since it uses less digits than its factorization.

1216160304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25336684 (or 25336678 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1216160304 is about 34873.4899888153. The cubic root of 1216160304 is about 1067.4075604386.

Adding to 1216160304 its reverse (4030616121), we get a palindrome (5246776425).

The spelling of 1216160304 in words is "one billion, two hundred sixteen million, one hundred sixty thousand, three hundred four".