1216036000 has 48 divisors (see below), whose sum is σ = 2987810280. Its totient is φ = 486412800.

The previous prime is 1216035991. The next prime is 1216036007. The reversal of 1216036000 is 6306121.

It can be written as a sum of positive squares in 4 ways, for example, as 204032656 + 1012003344 = 14284^2 + 31812^2 .

It is not an unprimeable number, because it can be changed into a prime (1216036007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148005 + ... + 156004.

Almost surely, 2^1216036000 is an apocalyptic number.

1216036000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216036000 is an abundant number, since it is smaller than the sum of its proper divisors (1771774280).

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

1216036000 is an equidigital number, since it uses as much as digits as its factorization.

1216036000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304034 (or 304016 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1216036000 is about 34871.7077299062. The cubic root of 1216036000 is about 1067.3711925492.

The spelling of 1216036000 in words is "one billion, two hundred sixteen million, thirty-six thousand".