1218489350 has 24 divisors (see below), whose sum is σ = 2440729200. Its totient is φ = 449903520.

The previous prime is 1218489329. The next prime is 1218489353. The reversal of 1218489350 is 539848121.

It is a junction number, because it is equal to n+sod(n) for n = 1218489298 and 1218489307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218489353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 936650 + ... + 937949.

It is an arithmetic number, because the mean of its divisors is an integer number (101697050).

Almost surely, 2^1218489350 is an apocalyptic number.

1218489350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218489350 is an abundant number, since it is smaller than the sum of its proper divisors (1222239850).

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

1218489350 is a wasteful number, since it uses less digits than its factorization.

1218489350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874624 (or 1874619 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 1218489350 is about 34906.8668029659. The cubic root of 1218489350 is about 1068.0885167228.

The spelling of 1218489350 in words is "one billion, two hundred eighteen million, four hundred eighty-nine thousand, three hundred fifty".