9987726942 has 24 divisors (see below), whose sum is σ = 22224943416. Its totient is φ = 3239262576.

The previous prime is 9987726923. The next prime is 9987726943. The reversal of 9987726942 is 2496277899.

9987726942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 9987726942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9987726943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7497628 + ... + 7498959.

It is an arithmetic number, because the mean of its divisors is an integer number (926039309).

Almost surely, 2^9987726942 is an apocalyptic number.

9987726942 is an abundant number, since it is smaller than the sum of its proper divisors (12237216474).

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

9987726942 is a wasteful number, since it uses less digits than its factorization.

9987726942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14996632 (or 14996629 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The square root of 9987726942 is about 99938.6158699429. The cubic root of 9987726942 is about 2153.5529458132.

The spelling of 9987726942 in words is "nine billion, nine hundred eighty-seven million, seven hundred twenty-six thousand, nine hundred forty-two".