1218957468 has 24 divisors (see below), whose sum is σ = 2844994320. Its totient is φ = 406210560.

The previous prime is 1218957463. The next prime is 1218957469. The reversal of 1218957468 is 8647598121.

It is a self number, because there is not a number n which added to its sum of digits gives 1218957468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218957461) 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, 42438 + ... + 65106.

It is an arithmetic number, because the mean of its divisors is an integer number (118541430).

Almost surely, 2^1218957468 is an apocalyptic number.

It is an amenable number.

1218957468 is an abundant number, since it is smaller than the sum of its proper divisors (1626036852).

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

1218957468 is a wasteful number, since it uses less digits than its factorization.

1218957468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27157 (or 27155 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The square root of 1218957468 is about 34913.5714013906. The cubic root of 1218957468 is about 1068.2252782642.

The spelling of 1218957468 in words is "one billion, two hundred eighteen million, nine hundred fifty-seven thousand, four hundred sixty-eight".