1218832388 has 24 divisors (see below), whose sum is σ = 2181416832. Its totient is φ = 595607264.

The previous prime is 1218832369. The next prime is 1218832397. The reversal of 1218832388 is 8832388121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141131 + ... + 149517.

It is an arithmetic number, because the mean of its divisors is an integer number (90892368).

Almost surely, 2^1218832388 is an apocalyptic number.

It is an amenable number.

1218832388 is a deficient number, since it is larger than the sum of its proper divisors (962584444).

1218832388 is a wasteful number, since it uses less digits than its factorization.

1218832388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9211 (or 9209 counting only the distinct ones).

The product of its digits is 147456, while the sum is 44.

The square root of 1218832388 is about 34911.7800749260. The cubic root of 1218832388 is about 1068.1887393388.

The spelling of 1218832388 in words is "one billion, two hundred eighteen million, eight hundred thirty-two thousand, three hundred eighty-eight".