1078639998 has 8 divisors (see below), whose sum is σ = 2157280008. Its totient is φ = 359546664.

The previous prime is 1078639973. The next prime is 1078640011. The reversal of 1078639998 is 8999368701.

1078639998 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

1078639998 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89886661 + ... + 89886672.

It is an arithmetic number, because the mean of its divisors is an integer number (269660001).

Almost surely, 2^1078639998 is an apocalyptic number.

1078639998 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.

1078639998 is a wasteful number, since it uses less digits than its factorization.

1078639998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179773338.

The product of its (nonzero) digits is 5878656, while the sum is 60.

The square root of 1078639998 is about 32842.6551606291. The cubic root of 1078639998 is about 1025.5547258657.

The spelling of 1078639998 in words is "one billion, seventy-eight million, six hundred thirty-nine thousand, nine hundred ninety-eight".