1218472276 has 48 divisors (see below), whose sum is σ = 2509903872. Its totient is φ = 506707200.

The previous prime is 1218472253. The next prime is 1218472301. The reversal of 1218472276 is 6722748121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216490 + ... + 222046.

It is an arithmetic number, because the mean of its divisors is an integer number (52289664).

Almost surely, 2^1218472276 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 1218472276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1254951936).

1218472276 is an abundant number, since it is smaller than the sum of its proper divisors (1291431596).

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

1218472276 is a wasteful number, since it uses less digits than its factorization.

1218472276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5800 (or 5798 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 1218472276 is about 34906.6222370484. The cubic root of 1218472276 is about 1068.0835278600.

It can be divided in two parts, 121847 and 2276, that multiplied together give a palindrome (277323772).

The spelling of 1218472276 in words is "one billion, two hundred eighteen million, four hundred seventy-two thousand, two hundred seventy-six".