9857943790 has 16 divisors (see below), whose sum is σ = 17747448912. Its totient is φ = 3942477504.

The previous prime is 9857943779. The next prime is 9857943841. The reversal of 9857943790 is 973497589.

It is a congruent number.

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, 26319 + ... + 142858.

It is an arithmetic number, because the mean of its divisors is an integer number (1109215557).

Almost surely, 2^9857943790 is an apocalyptic number.

9857943790 is a deficient number, since it is larger than the sum of its proper divisors (7889505122).

9857943790 is a wasteful number, since it uses less digits than its factorization.

9857943790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175011.

The product of its (nonzero) digits is 17146080, while the sum is 61.

The square root of 9857943790 is about 99287.1783766665. The cubic root of 9857943790 is about 2144.1843037837.

The spelling of 9857943790 in words is "nine billion, eight hundred fifty-seven million, nine hundred forty-three thousand, seven hundred ninety".