828280778 has 16 divisors (see below), whose sum is σ = 1343895840. Its totient is φ = 380596656.

The previous prime is 828280777. The next prime is 828280819. The reversal of 828280778 is 877082828.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (828280777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64268 + ... + 76071.

It is an arithmetic number, because the mean of its divisors is an integer number (83993490).

Almost surely, 2^828280778 is an apocalyptic number.

828280778 is a deficient number, since it is larger than the sum of its proper divisors (515615062).

828280778 is a wasteful number, since it uses less digits than its factorization.

828280778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140581.

The product of its (nonzero) digits is 802816, while the sum is 50.

The square root of 828280778 is about 28779.8675813493. The cubic root of 828280778 is about 939.1303175485.

The spelling of 828280778 in words is "eight hundred twenty-eight million, two hundred eighty thousand, seven hundred seventy-eight".