1218856376 has 16 divisors (see below), whose sum is σ = 2285758440. Its totient is φ = 609320800.

The previous prime is 1218856349. The next prime is 1218856381. The reversal of 1218856376 is 6736588121.

It is a super-2 number, since 2×1218856376² = 2971221730631706752, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1218856376.

It is a congruent number.

It is an unprimeable number.

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, 55826 + ... + 74526.

Almost surely, 2^1218856376 is an apocalyptic number.

It is an amenable number.

1218856376 is a deficient number, since it is larger than the sum of its proper divisors (1066902064).

1218856376 is a wasteful number, since it uses less digits than its factorization.

1218856376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26854 (or 26850 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 1218856376 is about 34912.1236248957. The cubic root of 1218856376 is about 1068.1957470137.

The spelling of 1218856376 in words is "one billion, two hundred eighteen million, eight hundred fifty-six thousand, three hundred seventy-six".