1218418339 has 8 divisors (see below), whose sum is σ = 1357989840. Its totient is φ = 1086391296.

The previous prime is 1218418303. The next prime is 1218418349. The reversal of 1218418339 is 9338148121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1218418339 - 2²³ = 1210029731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1218418349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1885774 + ... + 1886419.

It is an arithmetic number, because the mean of its divisors is an integer number (169748730).

Almost surely, 2^1218418339 is an apocalyptic number.

1218418339 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1218418339 is a deficient number, since it is larger than the sum of its proper divisors (139571501).

1218418339 is a wasteful number, since it uses less digits than its factorization.

1218418339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772229.

The product of its digits is 41472, while the sum is 40.

The square root of 1218418339 is about 34905.8496387067. The cubic root of 1218418339 is about 1068.0677676679.

The spelling of 1218418339 in words is "one billion, two hundred eighteen million, four hundred eighteen thousand, three hundred thirty-nine".