1218280895 has 16 divisors (see below), whose sum is σ = 1576065792. Its totient is φ = 898698240.

The previous prime is 1218280801. The next prime is 1218280919. The reversal of 1218280895 is 5980828121.

It is not a de Polignac number, because 1218280895 - 2²² = 1214086591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54959 + ... + 73871.

It is an arithmetic number, because the mean of its divisors is an integer number (98504112).

Almost surely, 2^1218280895 is an apocalyptic number.

1218280895 is a deficient number, since it is larger than the sum of its proper divisors (357784897).

1218280895 is a wasteful number, since it uses less digits than its factorization.

1218280895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19922.

The product of its (nonzero) digits is 92160, while the sum is 44.

The square root of 1218280895 is about 34903.8808014238. The cubic root of 1218280895 is about 1068.0276049363.

The spelling of 1218280895 in words is "one billion, two hundred eighteen million, two hundred eighty thousand, eight hundred ninety-five".