804404840 has 32 divisors (see below), whose sum is σ = 1814373000. Its totient is φ = 320968704.

The previous prime is 804404831. The next prime is 804404863. The reversal of 804404840 is 48404408.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 791972164 + 12432676 = 28142^2 + 3526^2 .

It is a junction number, because it is equal to n+sod(n) for n = 804404797 and 804404806.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8225 + ... + 40944.

Almost surely, 2^804404840 is an apocalyptic number.

It is an amenable number.

804404840 is an abundant number, since it is smaller than the sum of its proper divisors (1009968160).

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

804404840 is a wasteful number, since it uses less digits than its factorization.

804404840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49589 (or 49585 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 804404840 is about 28362.0316620654. The cubic root of 804404840 is about 930.0184372188.

The spelling of 804404840 in words is "eight hundred four million, four hundred four thousand, eight hundred forty".