804638140 has 12 divisors (see below), whose sum is σ = 1689740136. Its totient is φ = 321855248.

The previous prime is 804638137. The next prime is 804638207. The reversal of 804638140 is 41836408.

It is a junction number, because it is equal to n+sod(n) for n = 804638096 and 804638105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20115934 + ... + 20115973.

It is an arithmetic number, because the mean of its divisors is an integer number (140811678).

Almost surely, 2^804638140 is an apocalyptic number.

It is an amenable number.

804638140 is an abundant number, since it is smaller than the sum of its proper divisors (885101996).

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

804638140 is a wasteful number, since it uses less digits than its factorization.

804638140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40231916 (or 40231914 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 804638140 is about 28366.1442568425. The cubic root of 804638140 is about 930.1083390186.

The spelling of 804638140 in words is "eight hundred four million, six hundred thirty-eight thousand, one hundred forty".