9940891730 has 96 divisors (see below), whose sum is σ = 23253592320. Its totient is φ = 2991542400.

The previous prime is 9940891699. The next prime is 9940891733. The reversal of 9940891730 is 371980499.

It is not an unprimeable number, because it can be changed into a prime (9940891733) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 225395 + ... + 265865.

It is an arithmetic number, because the mean of its divisors is an integer number (242224920).

Almost surely, 2^9940891730 is an apocalyptic number.

9940891730 is an abundant number, since it is smaller than the sum of its proper divisors (13312700590).

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

9940891730 is a wasteful number, since it uses less digits than its factorization.

9940891730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40536 (or 40525 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 9940891730 is about 99704.0206310658. The cubic root of 9940891730 is about 2150.1814687283.

The spelling of 9940891730 in words is "nine billion, nine hundred forty million, eight hundred ninety-one thousand, seven hundred thirty".