1218536284 has 12 divisors (see below), whose sum is σ = 2437072624. Its totient is φ = 522229824.

The previous prime is 1218536273. The next prime is 1218536287. The reversal of 1218536284 is 4826358121.

1218536284 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218536287) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21759549 + ... + 21759604.

Almost surely, 2^1218536284 is an apocalyptic number.

1218536284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1218536284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1218536284 is a wasteful number, since it uses less digits than its factorization.

1218536284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43519164 (or 43519162 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 1218536284 is about 34907.5390710947. The cubic root of 1218536284 is about 1068.1022301576.

The spelling of 1218536284 in words is "one billion, two hundred eighteen million, five hundred thirty-six thousand, two hundred eighty-four".