1218338763 has 8 divisors (see below), whose sum is σ = 1624613376. Its totient is φ = 812145000.

The previous prime is 1218338743. The next prime is 1218338777. The reversal of 1218338763 is 3678338121.

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

It is not a de Polignac number, because 1218338763 - 2⁶ = 1218338699 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1218338713) 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, 45138 + ... + 66888.

It is an arithmetic number, because the mean of its divisors is an integer number (203076672).

Almost surely, 2^1218338763 is an apocalyptic number.

1218338763 is a deficient number, since it is larger than the sum of its proper divisors (406274613).

1218338763 is a wasteful number, since it uses less digits than its factorization.

1218338763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40425.

The product of its digits is 145152, while the sum is 42.

The square root of 1218338763 is about 34904.7097538427. The cubic root of 1218338763 is about 1068.0445150055.

The spelling of 1218338763 in words is "one billion, two hundred eighteen million, three hundred thirty-eight thousand, seven hundred sixty-three".