800520240 has 80 divisors (see below), whose sum is σ = 2672516448. Its totient is φ = 197050368.

The previous prime is 800520233. The next prime is 800520241. The reversal of 800520240 is 42025008.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (800520241) 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 15 ways as a sum of consecutive naturals, for example, 125169 + ... + 131408.

Almost surely, 2^800520240 is an apocalyptic number.

800520240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

800520240 is an abundant number, since it is smaller than the sum of its proper divisors (1871996208).

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

800520240 is a wasteful number, since it uses less digits than its factorization.

800520240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256606 (or 256600 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 800520240 is about 28293.4663836017. The cubic root of 800520240 is about 928.5189514666.

Adding to 800520240 its reverse (42025008), we get a palindrome (842545248).

The spelling of 800520240 in words is "eight hundred million, five hundred twenty thousand, two hundred forty".