828419778 has 16 divisors (see below), whose sum is σ = 1840932960. Its totient is φ = 276139908.

The previous prime is 828419777. The next prime is 828419783. The reversal of 828419778 is 877914828.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 15341107 = 828419778 / (8 + 2 + 8 + 4 + 1 + 9 + 7 + 7 + 8).

It is not an unprimeable number, because it can be changed into a prime (828419777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7670500 + ... + 7670607.

It is an arithmetic number, because the mean of its divisors is an integer number (115058310).

Almost surely, 2^828419778 is an apocalyptic number.

828419778 is an abundant number, since it is smaller than the sum of its proper divisors (1012513182).

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

828419778 is a wasteful number, since it uses less digits than its factorization.

828419778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15341118 (or 15341112 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 828419778 is about 28782.2823625924. The cubic root of 828419778 is about 939.1828487739.

The spelling of 828419778 in words is "eight hundred twenty-eight million, four hundred nineteen thousand, seven hundred seventy-eight".