828778 has 4 divisors (see below), whose sum is σ = 1243170. Its totient is φ = 414388.

The previous prime is 828757. The next prime is 828787. The reversal of 828778 is 877828.

828778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 797449 + 31329 = 893^2 + 177^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 828778.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207193 + ... + 207196.

2⁸²⁸⁷⁷⁸ is an apocalyptic number.

828778 is a deficient number, since it is larger than the sum of its proper divisors (414392).

828778 is a wasteful number, since it uses less digits than its factorization.

828778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414391.

The product of its digits is 50176, while the sum is 40.

The square root of 828778 is about 910.3724512528. The cubic root of 828778 is about 93.9318201842.

The spelling of 828778 in words is "eight hundred twenty-eight thousand, seven hundred seventy-eight".