98919978 has 8 divisors (see below), whose sum is σ = 197839968. Its totient is φ = 32973324.

The previous prime is 98919967. The next prime is 98920013. The reversal of 98919978 is 87991989.

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

98919978 is an admirable 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, 8243326 + ... + 8243337.

It is an arithmetic number, because the mean of its divisors is an integer number (24729996).

Almost surely, 2^98919978 is an apocalyptic number.

98919978 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.

98919978 is a wasteful number, since it uses less digits than its factorization.

98919978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16486668.

The product of its digits is 2939328, while the sum is 60.

The square root of 98919978 is about 9945.8523013365. The cubic root of 98919978 is about 462.4818252415.

The spelling of 98919978 in words is "ninety-eight million, nine hundred nineteen thousand, nine hundred seventy-eight".