1218486456 has 192 divisors, whose sum is σ = 3884025600. Its totient is φ = 353010240.

The previous prime is 1218486449. The next prime is 1218486457. The reversal of 1218486456 is 6546848121.

It is a happy number.

1218486456 is a `hidden beast` number, since 12 + 184 + 8 + 6 + 456 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218486457) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 600115 + ... + 602141.

It is an arithmetic number, because the mean of its divisors is an integer number (20229300).

Almost surely, 2^1218486456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218486456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1942012800).

1218486456 is an abundant number, since it is smaller than the sum of its proper divisors (2665539144).

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

1218486456 is a wasteful number, since it uses less digits than its factorization.

1218486456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087 (or 2066 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 1218486456 is about 34906.8253497794. The cubic root of 1218486456 is about 1068.0876711264.

The spelling of 1218486456 in words is "one billion, two hundred eighteen million, four hundred eighty-six thousand, four hundred fifty-six".