98811890 has 16 divisors (see below), whose sum is σ = 177979032. Its totient is φ = 39498624.

The previous prime is 98811877. The next prime is 98811901. The reversal of 98811890 is 9811889.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 72812089 + 25999801 = 8533^2 + 5099^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21692 + ... + 25848.

Almost surely, 2^98811890 is an apocalyptic number.

98811890 is a deficient number, since it is larger than the sum of its proper divisors (79167142).

98811890 is a wasteful number, since it uses less digits than its factorization.

98811890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541.

The product of its (nonzero) digits is 41472, while the sum is 44.

The square root of 98811890 is about 9940.4169932654. The cubic root of 98811890 is about 462.3133154526.

The spelling of 98811890 in words is "ninety-eight million, eight hundred eleven thousand, eight hundred ninety".