1218315830 has 16 divisors (see below), whose sum is σ = 2193744384. Its totient is φ = 487153920.

The previous prime is 1218315821. The next prime is 1218315859. The reversal of 1218315830 is 385138121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10379 + ... + 50441.

It is an arithmetic number, because the mean of its divisors is an integer number (137109024).

Almost surely, 2^1218315830 is an apocalyptic number.

1218315830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218315830 is a deficient number, since it is larger than the sum of its proper divisors (975428554).

1218315830 is a wasteful number, since it uses less digits than its factorization.

1218315830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43111.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 1218315830 is about 34904.3812436204. The cubic root of 1218315830 is about 1068.0378136349.

The spelling of 1218315830 in words is "one billion, two hundred eighteen million, three hundred fifteen thousand, eight hundred thirty".