1218283776 has 108 divisors (see below), whose sum is σ = 3522410892. Its totient is φ = 404963328.

The previous prime is 1218283763. The next prime is 1218283789. The reversal of 1218283776 is 6773828121.

It is an interprime number because it is at equal distance from previous prime (1218283763) and next prime (1218283789).

It can be written as a sum of positive squares in 2 ways, for example, as 546437376 + 671846400 = 23376^2 + 25920^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1421140 + ... + 1421996.

Almost surely, 2^1218283776 is an apocalyptic number.

1218283776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218283776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1761205446).

1218283776 is an abundant number, since it is smaller than the sum of its proper divisors (2304127116).

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

1218283776 is an equidigital number, since it uses as much as digits as its factorization.

1218283776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496 (or 1479 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 1218283776 is about 34903.9220718818. The cubic root of 1218283776 is about 1068.0284468289.

The spelling of 1218283776 in words is "one billion, two hundred eighteen million, two hundred eighty-three thousand, seven hundred seventy-six".