820078748 has 12 divisors (see below), whose sum is σ = 1465672992. Its totient is φ = 401315040.

The previous prime is 820078747. The next prime is 820078769. The reversal of 820078748 is 847870028.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 820078699 and 820078708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820078747) 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 3 ways as a sum of consecutive naturals, for example, 2180873 + ... + 2181248.

It is an arithmetic number, because the mean of its divisors is an integer number (122139416).

Almost surely, 2^820078748 is an apocalyptic number.

It is an amenable number.

820078748 is a deficient number, since it is larger than the sum of its proper divisors (645594244).

820078748 is a wasteful number, since it uses less digits than its factorization.

820078748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4362172 (or 4362170 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 44.

The square root of 820078748 is about 28637.0170932658. The cubic root of 820078748 is about 936.0201236938.

The spelling of 820078748 in words is "eight hundred twenty million, seventy-eight thousand, seven hundred forty-eight".