804040240 has 40 divisors (see below), whose sum is σ = 1890414720. Its totient is φ = 317999616.

The previous prime is 804040199. The next prime is 804040247. The reversal of 804040240 is 42040408.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (804040247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49344 + ... + 63583.

It is an arithmetic number, because the mean of its divisors is an integer number (47260368).

Almost surely, 2^804040240 is an apocalyptic number.

804040240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

804040240 is an abundant number, since it is smaller than the sum of its proper divisors (1086374480).

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

804040240 is a wasteful number, since it uses less digits than its factorization.

804040240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113029 (or 113023 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 804040240 is about 28355.6033263269. The cubic root of 804040240 is about 929.8779043474.

Adding to 804040240 its reverse (42040408), we get a palindrome (846080648).

The spelling of 804040240 in words is "eight hundred four million, forty thousand, two hundred forty".