804386628 has 36 divisors (see below), whose sum is σ = 2056165020. Its totient is φ = 265115136.

The previous prime is 804386621. The next prime is 804386629. The reversal of 804386628 is 826683408.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 469935684 + 334450944 = 21678^2 + 18288^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (804386621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122325 + ... + 128732.

It is an arithmetic number, because the mean of its divisors is an integer number (57115695).

Almost surely, 2^804386628 is an apocalyptic number.

It is an amenable number.

804386628 is an abundant number, since it is smaller than the sum of its proper divisors (1251778392).

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

804386628 is a wasteful number, since it uses less digits than its factorization.

804386628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251156 (or 251151 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 804386628 is about 28361.7105972119. The cubic root of 804386628 is about 930.0114185209.

The spelling of 804386628 in words is "eight hundred four million, three hundred eighty-six thousand, six hundred twenty-eight".