800405240 has 32 divisors (see below), whose sum is σ = 1802861280. Its totient is φ = 319815552.

The previous prime is 800405227. The next prime is 800405251. The reversal of 800405240 is 42504008.

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, 28334 + ... + 49026.

It is an arithmetic number, because the mean of its divisors is an integer number (56339415).

Almost surely, 2^800405240 is an apocalyptic number.

It is an amenable number.

800405240 is an abundant number, since it is smaller than the sum of its proper divisors (1002456040).

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

800405240 is a wasteful number, since it uses less digits than its factorization.

800405240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21671 (or 21667 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 800405240 is about 28291.4340392989. The cubic root of 800405240 is about 928.4744867183.

Adding to 800405240 its reverse (42504008), we get a palindrome (842909248).

The spelling of 800405240 in words is "eight hundred million, four hundred five thousand, two hundred forty".