806778 has 48 divisors (see below), whose sum is σ = 2109120. Its totient is φ = 217728.

The previous prime is 806761. The next prime is 806783. The reversal of 806778 is 877608.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2226 + ... + 2562.

It is an arithmetic number, because the mean of its divisors is an integer number (43940).

2⁸⁰⁶⁷⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 806778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1054560).

806778 is an abundant number, since it is smaller than the sum of its proper divisors (1302342).

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

806778 is a wasteful number, since it uses less digits than its factorization.

806778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 806778 is about 898.2082163953. The cubic root of 806778 is about 93.0932121285.

The spelling of 806778 in words is "eight hundred six thousand, seven hundred seventy-eight".