1098316678 has 4 divisors (see below), whose sum is σ = 1647475020. Its totient is φ = 549158338.

The previous prime is 1098316649. The next prime is 1098316691. The reversal of 1098316678 is 8766138901.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274579168 + ... + 274579171.

It is an arithmetic number, because the mean of its divisors is an integer number (411868755).

Almost surely, 2^1098316678 is an apocalyptic number.

1098316678 is a deficient number, since it is larger than the sum of its proper divisors (549158342).

1098316678 is an equidigital number, since it uses as much as digits as its factorization.

1098316678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549158341.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1098316678 is about 33140.8611535669. The cubic root of 1098316678 is about 1031.7532830446.

The spelling of 1098316678 in words is "one billion, ninety-eight million, three hundred sixteen thousand, six hundred seventy-eight".