1098131478 has 8 divisors (see below), whose sum is σ = 2196262968. Its totient is φ = 366043824.

The previous prime is 1098131459. The next prime is 1098131479. The reversal of 1098131478 is 8741318901.

It is a sphenic number, since it is the product of 3 distinct primes.

1098131478 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098131479) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 91510951 + ... + 91510962.

It is an arithmetic number, because the mean of its divisors is an integer number (274532871).

Almost surely, 2^1098131478 is an apocalyptic number.

1098131478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1098131478 is a wasteful number, since it uses less digits than its factorization.

1098131478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183021918.

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 1098131478 is about 33138.0669019785. The cubic root of 1098131478 is about 1031.6952877951.

The spelling of 1098131478 in words is "one billion, ninety-eight million, one hundred thirty-one thousand, four hundred seventy-eight".