1218985360 has 20 divisors (see below), whose sum is σ = 2834141148. Its totient is φ = 487594112.

The previous prime is 1218985351. The next prime is 1218985367. The reversal of 1218985360 is 635898121.

It can be written as a sum of positive squares in 2 ways, for example, as 845413776 + 373571584 = 29076^2 + 19328^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1218985367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7618579 + ... + 7618738.

Almost surely, 2^1218985360 is an apocalyptic number.

1218985360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1218985360 is an abundant number, since it is smaller than the sum of its proper divisors (1615155788).

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

1218985360 is a wasteful number, since it uses less digits than its factorization.

1218985360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15237330 (or 15237324 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 1218985360 is about 34913.9708426297. The cubic root of 1218985360 is about 1068.2334258584.

The spelling of 1218985360 in words is "one billion, two hundred eighteen million, nine hundred eighty-five thousand, three hundred sixty".