9898987854 has 32 divisors (see below), whose sum is σ = 22637802240. Its totient is φ = 2826839232.

The previous prime is 9898987853. The next prime is 9898987877. The reversal of 9898987854 is 4587898989.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9898987853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24577 + ... + 142835.

It is an arithmetic number, because the mean of its divisors is an integer number (707431320).

Almost surely, 2^9898987854 is an apocalyptic number.

9898987854 is an abundant number, since it is smaller than the sum of its proper divisors (12738814386).

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

9898987854 is a wasteful number, since it uses less digits than its factorization.

9898987854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120264.

The product of its digits is 418037760, while the sum is 75.

The square root of 9898987854 is about 99493.6573556325. The cubic root of 9898987854 is about 2147.1559911239.

The spelling of 9898987854 in words is "nine billion, eight hundred ninety-eight million, nine hundred eighty-seven thousand, eight hundred fifty-four".