820026804 has 24 divisors (see below), whose sum is σ = 1916762848. Its totient is φ = 272861280.

The previous prime is 820026769. The next prime is 820026821. The reversal of 820026804 is 408620028.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52987 + ... + 66690.

Almost surely, 2^820026804 is an apocalyptic number.

It is an amenable number.

820026804 is an abundant number, since it is smaller than the sum of its proper divisors (1096736044).

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

820026804 is a wasteful number, since it uses less digits than its factorization.

820026804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120255 (or 120253 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 820026804 is about 28636.1101408693. The cubic root of 820026804 is about 936.0003606909. Note that the first 3 decimals are identical.

The spelling of 820026804 in words is "eight hundred twenty million, twenty-six thousand, eight hundred four".