1218560798 has 16 divisors (see below), whose sum is σ = 2249651040. Its totient is φ = 482067936.

The previous prime is 1218560767. The next prime is 1218560857. The reversal of 1218560798 is 8970658121.

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 7 ways as a sum of consecutive naturals, for example, 3347513 + ... + 3347876.

It is an arithmetic number, because the mean of its divisors is an integer number (140603190).

Almost surely, 2^1218560798 is an apocalyptic number.

1218560798 is a deficient number, since it is larger than the sum of its proper divisors (1031090242).

1218560798 is a wasteful number, since it uses less digits than its factorization.

1218560798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6695411.

The product of its (nonzero) digits is 241920, while the sum is 47.

The square root of 1218560798 is about 34907.8901969168. The cubic root of 1218560798 is about 1068.1093926533.

The spelling of 1218560798 in words is "one billion, two hundred eighteen million, five hundred sixty thousand, seven hundred ninety-eight".