1218445332 has 48 divisors (see below), whose sum is σ = 3194862720. Its totient is φ = 358604928.

The previous prime is 1218445331. The next prime is 1218445337. The reversal of 1218445332 is 2335448121.

It is a junction number, because it is equal to n+sod(n) for n = 1218445293 and 1218445302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218445331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166207 + ... + 173382.

It is an arithmetic number, because the mean of its divisors is an integer number (66559640).

Almost surely, 2^1218445332 is an apocalyptic number.

1218445332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1218445332 is an abundant number, since it is smaller than the sum of its proper divisors (1976417388).

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

1218445332 is a wasteful number, since it uses less digits than its factorization.

1218445332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339632 (or 339630 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 1218445332 is about 34906.2362909552. The cubic root of 1218445332 is about 1068.0756549809.

The spelling of 1218445332 in words is "one billion, two hundred eighteen million, four hundred forty-five thousand, three hundred thirty-two".