1218968272 has 20 divisors (see below), whose sum is σ = 2500678116. Its totient is φ = 573632000.

The previous prime is 1218968269. The next prime is 1218968291. The reversal of 1218968272 is 2728698121.

It can be written as a sum of positive squares in 2 ways, for example, as 462938256 + 756030016 = 21516^2 + 27496^2 .

It is a congruent number.

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, 2240479 + ... + 2241022.

Almost surely, 2^1218968272 is an apocalyptic number.

It is an amenable number.

1218968272 is an abundant number, since it is smaller than the sum of its proper divisors (1281709844).

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

1218968272 is a wasteful number, since it uses less digits than its factorization.

1218968272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481526 (or 4481520 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 1218968272 is about 34913.7261259809. The cubic root of 1218968272 is about 1068.2284342595.

The spelling of 1218968272 in words is "one billion, two hundred eighteen million, nine hundred sixty-eight thousand, two hundred seventy-two".