806543990 has 64 divisors (see below), whose sum is σ = 1757389824. Its totient is φ = 260523648.

The previous prime is 806543987. The next prime is 806544023. The reversal of 806543990 is 99345608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104132 + ... + 111608.

It is an arithmetic number, because the mean of its divisors is an integer number (27459216).

Almost surely, 2^806543990 is an apocalyptic number.

806543990 is an abundant number, since it is smaller than the sum of its proper divisors (950845834).

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

806543990 is a wasteful number, since it uses less digits than its factorization.

806543990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7581.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 806543990 is about 28399.7181324041. The cubic root of 806543990 is about 930.8421054064.

The spelling of 806543990 in words is "eight hundred six million, five hundred forty-three thousand, nine hundred ninety".