9689889894 has 32 divisors (see below), whose sum is σ = 19871879904. Its totient is φ = 3148884480.

The previous prime is 9689889893. The next prime is 9689889899. The reversal of 9689889894 is 4989889869.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9689889893) 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, 75789 + ... + 158504.

It is an arithmetic number, because the mean of its divisors is an integer number (620996247).

Almost surely, 2^9689889894 is an apocalyptic number.

9689889894 is an abundant number, since it is smaller than the sum of its proper divisors (10181990010).

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

9689889894 is a wasteful number, since it uses less digits than its factorization.

9689889894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234472.

The product of its digits is 644972544, while the sum is 78.

The square root of 9689889894 is about 98437.2383501285. The cubic root of 9689889894 is about 2131.9300318070.

The spelling of 9689889894 in words is "nine billion, six hundred eighty-nine million, eight hundred eighty-nine thousand, eight hundred ninety-four".