806393978 has 24 divisors (see below), whose sum is σ = 1316756736. Its totient is φ = 370203600.

The previous prime is 806393941. The next prime is 806394019. The reversal of 806393978 is 879393608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58313 + ... + 70803.

It is an arithmetic number, because the mean of its divisors is an integer number (54864864).

Almost surely, 2^806393978 is an apocalyptic number.

806393978 is a deficient number, since it is larger than the sum of its proper divisors (510362758).

806393978 is a wasteful number, since it uses less digits than its factorization.

806393978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12710 (or 12697 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 806393978 is about 28397.0769270360. The cubic root of 806393978 is about 930.7843916112.

The spelling of 806393978 in words is "eight hundred six million, three hundred ninety-three thousand, nine hundred seventy-eight".