804638421 has 16 divisors (see below), whose sum is σ = 1214550720. Its totient is φ = 526303440.

The previous prime is 804638413. The next prime is 804638447. The reversal of 804638421 is 124836408.

It is not a de Polignac number, because 804638421 - 2³ = 804638413 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804638411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279715 + ... + 282576.

It is an arithmetic number, because the mean of its divisors is an integer number (75909420).

Almost surely, 2^804638421 is an apocalyptic number.

It is an amenable number.

804638421 is a deficient number, since it is larger than the sum of its proper divisors (409912299).

804638421 is a wasteful number, since it uses less digits than its factorization.

804638421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562353 (or 562347 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 804638421 is about 28366.1492099298. The cubic root of 804638421 is about 930.1084472910.

The spelling of 804638421 in words is "eight hundred four million, six hundred thirty-eight thousand, four hundred twenty-one".