98821138 has 32 divisors (see below), whose sum is σ = 164678976. Its totient is φ = 44186688.

The previous prime is 98821123. The next prime is 98821141. The reversal of 98821138 is 83112889.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

98821138 is a modest number, since divided by 21138 gives 988 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 98821138.

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 15 ways as a sum of consecutive naturals, for example, 175245 + ... + 175807.

It is an arithmetic number, because the mean of its divisors is an integer number (5146218).

Almost surely, 2^98821138 is an apocalyptic number.

98821138 is a deficient number, since it is larger than the sum of its proper divisors (65857838).

98821138 is a wasteful number, since it uses less digits than its factorization.

98821138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778.

The product of its digits is 27648, while the sum is 40.

The square root of 98821138 is about 9940.8821540143. The cubic root of 98821138 is about 462.3277379415.

The spelling of 98821138 in words is "ninety-eight million, eight hundred twenty-one thousand, one hundred thirty-eight".