9905392806 has 16 divisors (see below), whose sum is σ = 20049470784. Its totient is φ = 3262016744.

The previous prime is 9905392781. The next prime is 9905392807. The reversal of 9905392806 is 6082935099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9905392807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9944676 + ... + 9945671.

It is an arithmetic number, because the mean of its divisors is an integer number (1253091924).

Almost surely, 2^9905392806 is an apocalyptic number.

9905392806 is an abundant number, since it is smaller than the sum of its proper divisors (10144077978).

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

9905392806 is a wasteful number, since it uses less digits than its factorization.

9905392806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19890435.

The product of its (nonzero) digits is 1049760, while the sum is 51.

The square root of 9905392806 is about 99525.8398909550. The cubic root of 9905392806 is about 2147.6189834434.

It can be divided in two parts, 990539 and 2806, that added together give a triangular number (993345 = T₁₄₀₉).

The spelling of 9905392806 in words is "nine billion, nine hundred five million, three hundred ninety-two thousand, eight hundred six".