820547004 has 24 divisors (see below), whose sum is σ = 1915540480. Its totient is φ = 273382704.

The previous prime is 820547003. The next prime is 820547017. The reversal of 820547004 is 400745028.

820547004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820547003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10917 + ... + 41955.

Almost surely, 2^820547004 is an apocalyptic number.

It is an amenable number.

820547004 is an abundant number, since it is smaller than the sum of its proper divisors (1094993476).

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

820547004 is a wasteful number, since it uses less digits than its factorization.

820547004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33249 (or 33247 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 820547004 is about 28645.1916383885. The cubic root of 820547004 is about 936.1982422162.

The spelling of 820547004 in words is "eight hundred twenty million, five hundred forty-seven thousand, four".