9889743426 has 16 divisors (see below), whose sum is σ = 19790069664. Its totient is φ = 3294817344.

The previous prime is 9889743403. The next prime is 9889743439. The reversal of 9889743426 is 6243479889.

It is a super-2 number, since 2×9889743426² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9889743426.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428776 + ... + 451251.

It is an arithmetic number, because the mean of its divisors is an integer number (1236879354).

Almost surely, 2^9889743426 is an apocalyptic number.

9889743426 is an abundant number, since it is smaller than the sum of its proper divisors (9900326238).

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

9889743426 is a wasteful number, since it uses less digits than its factorization.

9889743426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881905.

The product of its digits is 20901888, while the sum is 60.

The square root of 9889743426 is about 99447.1891307140. The cubic root of 9889743426 is about 2146.4873904086.

The spelling of 9889743426 in words is "nine billion, eight hundred eighty-nine million, seven hundred forty-three thousand, four hundred twenty-six".