1118498278 has 4 divisors (see below), whose sum is σ = 1677747420. Its totient is φ = 559249138.

The previous prime is 1118498243. The next prime is 1118498279. The reversal of 1118498278 is 8728948111.

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 not an unprimeable number, because it can be changed into a prime (1118498279) by changing a digit.

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, 279624568 + ... + 279624571.

It is an arithmetic number, because the mean of its divisors is an integer number (419436855).

Almost surely, 2^1118498278 is an apocalyptic number.

1118498278 is a deficient number, since it is larger than the sum of its proper divisors (559249142).

1118498278 is an equidigital number, since it uses as much as digits as its factorization.

1118498278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559249141.

The product of its digits is 258048, while the sum is 49.

The square root of 1118498278 is about 33443.9572718301. The cubic root of 1118498278 is about 1038.0344649934.

The spelling of 1118498278 in words is "one billion, one hundred eighteen million, four hundred ninety-eight thousand, two hundred seventy-eight".