9986629870 has 32 divisors (see below), whose sum is σ = 20625808896. Its totient is φ = 3410340000.

The previous prime is 9986629837. The next prime is 9986629879. The reversal of 9986629870 is 789266899.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986629879) 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, 266626 + ... + 301765.

It is an arithmetic number, because the mean of its divisors is an integer number (644556528).

Almost surely, 2^9986629870 is an apocalyptic number.

9986629870 is an abundant number, since it is smaller than the sum of its proper divisors (10639179026).

9986629870 is a wasteful number, since it uses less digits than its factorization.

9986629870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568656.

The product of its (nonzero) digits is 23514624, while the sum is 64.

The square root of 9986629870 is about 99933.1269900027. The cubic root of 9986629870 is about 2153.4740927315.

The spelling of 9986629870 in words is "nine billion, nine hundred eighty-six million, six hundred twenty-nine thousand, eight hundred seventy".