1812727678 has 16 divisors (see below), whose sum is σ = 2814995520. Its totient is φ = 874924416.

The previous prime is 1812727649. The next prime is 1812727687. The reversal of 1812727678 is 8767272181.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125223 + ... + 138946.

It is an arithmetic number, because the mean of its divisors is an integer number (175937220).

Almost surely, 2^1812727678 is an apocalyptic number.

1812727678 is a deficient number, since it is larger than the sum of its proper divisors (1002267842).

1812727678 is a wasteful number, since it uses less digits than its factorization.

1812727678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264291.

The product of its digits is 526848, while the sum is 49.

The square root of 1812727678 is about 42576.1397733519. The cubic root of 1812727678 is about 1219.3007903317.

The spelling of 1812727678 in words is "one billion, eight hundred twelve million, seven hundred twenty-seven thousand, six hundred seventy-eight".