99998078 has 8 divisors (see below), whose sum is σ = 150625440. Its totient is φ = 49789600.

The previous prime is 99998071. The next prime is 99998099. The reversal of 99998078 is 87089999.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99998071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104123 + ... + 105078.

It is an arithmetic number, because the mean of its divisors is an integer number (18828180).

Almost surely, 2^99998078 is an apocalyptic number.

99998078 is a deficient number, since it is larger than the sum of its proper divisors (50627362).

99998078 is a wasteful number, since it uses less digits than its factorization.

99998078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209442.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The square root of 99998078 is about 9999.9038995382. The cubic root of 99998078 is about 464.1559096310.

The spelling of 99998078 in words is "ninety-nine million, nine hundred ninety-eight thousand, seventy-eight".