806870778 has 16 divisors (see below), whose sum is σ = 1844276160. Its totient is φ = 230534496.

The previous prime is 806870731. The next prime is 806870839. The reversal of 806870778 is 877078608.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 806870778.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9605563 + ... + 9605646.

It is an arithmetic number, because the mean of its divisors is an integer number (115267260).

Almost surely, 2^806870778 is an apocalyptic number.

806870778 is an abundant number, since it is smaller than the sum of its proper divisors (1037405382).

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

806870778 is a wasteful number, since it uses less digits than its factorization.

806870778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19211221.

The product of its (nonzero) digits is 1053696, while the sum is 51.

The square root of 806870778 is about 28405.4709167090. The cubic root of 806870778 is about 930.9678050832.

The spelling of 806870778 in words is "eight hundred six million, eight hundred seventy thousand, seven hundred seventy-eight".