1218846436 has 12 divisors (see below), whose sum is σ = 2133513900. Its totient is φ = 609271040.

The previous prime is 1218846427. The next prime is 1218846439. The reversal of 1218846436 is 6346488121.

It can be written as a sum of positive squares in 2 ways, for example, as 1211040000 + 7806436 = 34800^2 + 2794^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1218846392 and 1218846401.

It is not an unprimeable number, because it can be changed into a prime (1218846439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18961 + ... + 52888.

It is an arithmetic number, because the mean of its divisors is an integer number (177792825).

Almost surely, 2^1218846436 is an apocalyptic number.

It is an amenable number.

1218846436 is a deficient number, since it is larger than the sum of its proper divisors (914667464).

1218846436 is a wasteful number, since it uses less digits than its factorization.

1218846436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76094 (or 76092 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The square root of 1218846436 is about 34911.9812671810. The cubic root of 1218846436 is about 1068.1928432276.

The spelling of 1218846436 in words is "one billion, two hundred eighteen million, eight hundred forty-six thousand, four hundred thirty-six".