98778 has 16 divisors (see below), whose sum is σ = 200736. Its totient is φ = 32400.

The previous prime is 98773. The next prime is 98779. The reversal of 98778 is 87789.

It is not an unprimeable number, because it can be changed into a prime (98773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525 + ... + 687.

It is an arithmetic number, because the mean of its divisors is an integer number (12546).

2⁹⁸⁷⁷⁸ is an apocalyptic number.

98778 is an abundant number, since it is smaller than the sum of its proper divisors (101958).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100368).

98778 is a wasteful number, since it uses less digits than its factorization.

98778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269.

The product of its digits is 28224, while the sum is 39.

The square root of 98778 is about 314.2896752997. The cubic root of 98778 is about 46.2260455452.

The spelling of 98778 in words is "ninety-eight thousand, seven hundred seventy-eight".