804778040 has 32 divisors (see below), whose sum is σ = 1975365360. Its totient is φ = 292646400.

The previous prime is 804778033. The next prime is 804778069. The reversal of 804778040 is 40877408.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 804777985 and 804778003.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 914081 + ... + 914960.

Almost surely, 2^804778040 is an apocalyptic number.

It is an amenable number.

804778040 is an abundant number, since it is smaller than the sum of its proper divisors (1170587320).

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

804778040 is a wasteful number, since it uses less digits than its factorization.

804778040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829063 (or 1829059 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 804778040 is about 28368.6101175225. The cubic root of 804778040 is about 930.1622409361.

The spelling of 804778040 in words is "eight hundred four million, seven hundred seventy-eight thousand, forty".