98778589 has 16 divisors (see below), whose sum is σ = 121824640. Its totient is φ = 77993280.

The previous prime is 98778577. The next prime is 98778593. The reversal of 98778589 is 98587789.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98778589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98778509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63754 + ... + 65284.

It is an arithmetic number, because the mean of its divisors is an integer number (7614040).

Almost surely, 2^98778589 is an apocalyptic number.

It is an amenable number.

98778589 is a deficient number, since it is larger than the sum of its proper divisors (23046051).

98778589 is a wasteful number, since it uses less digits than its factorization.

98778589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260.

The product of its digits is 10160640, while the sum is 61.

The square root of 98778589 is about 9938.7418217801. The cubic root of 98778589 is about 462.2613742488.

The spelling of 98778589 in words is "ninety-eight million, seven hundred seventy-eight thousand, five hundred eighty-nine".