98815815 has 64 divisors (see below), whose sum is σ = 212613120. Its totient is φ = 42508800.

The previous prime is 98815813. The next prime is 98815853. The reversal of 98815815 is 51851889.

It is not a de Polignac number, because 98815815 - 2¹ = 98815813 is a prime.

It is a super-2 number, since 2×98815815² = 19529130588228450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98815813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12990 + ... + 19140.

It is an arithmetic number, because the mean of its divisors is an integer number (3322080).

Almost surely, 2^98815815 is an apocalyptic number.

98815815 is an abundant number, since it is smaller than the sum of its proper divisors (113797305).

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

98815815 is a wasteful number, since it uses less digits than its factorization.

98815815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6189 (or 6183 counting only the distinct ones).

The product of its digits is 115200, while the sum is 45.

The square root of 98815815 is about 9940.6144176303. The cubic root of 98815815 is about 462.3194366988.

The spelling of 98815815 in words is "ninety-eight million, eight hundred fifteen thousand, eight hundred fifteen".