1678906312 has 8 divisors (see below), whose sum is σ = 3147949350. Its totient is φ = 839453152.

The previous prime is 1678906303. The next prime is 1678906343. The reversal of 1678906312 is 2136098761.

It can be written as a sum of positive squares in only one way, i.e., 1678868676 + 37636 = 40974^2 + 194^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104931637 + ... + 104931652.

Almost surely, 2^1678906312 is an apocalyptic number.

It is an amenable number.

1678906312 is a deficient number, since it is larger than the sum of its proper divisors (1469043038).

1678906312 is a wasteful number, since it uses less digits than its factorization.

1678906312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209863295 (or 209863291 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 1678906312 is about 40974.4592642783. The cubic root of 1678906312 is about 1188.5263664532.

The spelling of 1678906312 in words is "one billion, six hundred seventy-eight million, nine hundred six thousand, three hundred twelve".