988861898 has 4 divisors (see below), whose sum is σ = 1483292850. Its totient is φ = 494430948.

The previous prime is 988861891. The next prime is 988861919. The reversal of 988861898 is 898168889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 898168889 = 29 ⋅30971341.

It can be written as a sum of positive squares in only one way, i.e., 840826009 + 148035889 = 28997^2 + 12167^2 .

It is not an unprimeable number, because it can be changed into a prime (988861891) 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 as a sum of consecutive naturals, namely, 247215473 + ... + 247215476.

Almost surely, 2^988861898 is an apocalyptic number.

988861898 is a deficient number, since it is larger than the sum of its proper divisors (494430952).

988861898 is a wasteful number, since it uses less digits than its factorization.

988861898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494430951.

The product of its digits is 15925248, while the sum is 65.

The square root of 988861898 is about 31446.1746163186. The cubic root of 988861898 is about 996.2734292545.

The spelling of 988861898 in words is "nine hundred eighty-eight million, eight hundred sixty-one thousand, eight hundred ninety-eight".