9998876890 has 8 divisors (see below), whose sum is σ = 17997978420. Its totient is φ = 3999550752.

The previous prime is 9998876887. The next prime is 9998876891. The reversal of 9998876890 is 986788999.

It can be written as a sum of positive squares in 2 ways, for example, as 9028990441 + 969886449 = 95021^2 + 31143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×9998876890² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9998876891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499943835 + ... + 499943854.

Almost surely, 2^9998876890 is an apocalyptic number.

9998876890 is a deficient number, since it is larger than the sum of its proper divisors (7999101530).

9998876890 is a wasteful number, since it uses less digits than its factorization.

9998876890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999887696.

The product of its (nonzero) digits is 141087744, while the sum is 73.

The square root of 9998876890 is about 99994.3842923191. The cubic root of 9998876890 is about 2154.3540314407.

The spelling of 9998876890 in words is "nine billion, nine hundred ninety-eight million, eight hundred seventy-six thousand, eight hundred ninety".