98787878 has 16 divisors (see below), whose sum is σ = 178264320. Its totient is φ = 40109256.

The previous prime is 98787869. The next prime is 98787961. The reversal of 98787878 is 87878789.

98787878 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 98787878.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185426 + ... + 185957.

It is an arithmetic number, because the mean of its divisors is an integer number (11141520).

Almost surely, 2^98787878 is an apocalyptic number.

98787878 is a deficient number, since it is larger than the sum of its proper divisors (79476442).

98787878 is a wasteful number, since it uses less digits than its factorization.

98787878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371411.

The product of its digits is 12644352, while the sum is 62.

The square root of 98787878 is about 9939.2091234665. The cubic root of 98787878 is about 462.2758639318.

The spelling of 98787878 in words is "ninety-eight million, seven hundred eighty-seven thousand, eight hundred seventy-eight".