98181818 has 16 divisors (see below), whose sum is σ = 171072384. Its totient is φ = 41387760.

The previous prime is 98181803. The next prime is 98181823. The reversal of 98181818 is 81818189.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

98181818 is a modest number, since divided by 181818 gives 98 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56630 + ... + 58337.

It is an arithmetic number, because the mean of its divisors is an integer number (10692024).

Almost surely, 2^98181818 is an apocalyptic number.

98181818 is a deficient number, since it is larger than the sum of its proper divisors (72890566).

98181818 is a wasteful number, since it uses less digits than its factorization.

98181818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115037.

The product of its digits is 36864, while the sum is 44.

The square root of 98181818 is about 9908.6738769625. The cubic root of 98181818 is about 461.3285756124.

It can be divided in two parts, 9818181 and 8, that added together give a palindrome (9818189).

The spelling of 98181818 in words is "ninety-eight million, one hundred eighty-one thousand, eight hundred eighteen".