9897648894 has 36 divisors (see below), whose sum is σ = 24511229496. Its totient is φ = 2827580616.

The previous prime is 9897648881. The next prime is 9897648941. The reversal of 9897648894 is 4988467989.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 1112307 + ... + 1121169.

It is an arithmetic number, because the mean of its divisors is an integer number (680867486).

Almost surely, 2^9897648894 is an apocalyptic number.

9897648894 is an abundant number, since it is smaller than the sum of its proper divisors (14613580602).

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

9897648894 is an frugal number, since it uses more digits than its factorization.

9897648894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17741 (or 8875 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 72.

The square root of 9897648894 is about 99486.9282569323. The cubic root of 9897648894 is about 2147.0591769963.

The spelling of 9897648894 in words is "nine billion, eight hundred ninety-seven million, six hundred forty-eight thousand, eight hundred ninety-four".