806868990 has 96 divisors (see below), whose sum is σ = 2163957120. Its totient is φ = 208438272.

The previous prime is 806868893. The next prime is 806869013. The reversal of 806868990 is 99868608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1121851 + ... + 1122569.

It is an arithmetic number, because the mean of its divisors is an integer number (22541220).

Almost surely, 2^806868990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 806868990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1081978560).

806868990 is an abundant number, since it is smaller than the sum of its proper divisors (1357088130).

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

806868990 is a wasteful number, since it uses less digits than its factorization.

806868990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 1103 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 806868990 is about 28405.4394438812. The cubic root of 806868990 is about 930.9671174176.

It can be divided in two parts, 80686 and 8990, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 806868990 in words is "eight hundred six million, eight hundred sixty-eight thousand, nine hundred ninety".