800321040 has 160 divisors (see below), whose sum is σ = 2901897600. Its totient is φ = 202176000.

The previous prime is 800320991. The next prime is 800321047. The reversal of 800321040 is 40123008.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800321047) 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 31 ways as a sum of consecutive naturals, for example, 31290 + ... + 50790.

It is an arithmetic number, because the mean of its divisors is an integer number (18136860).

Almost surely, 2^800321040 is an apocalyptic number.

800321040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 800321040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1450948800).

800321040 is an abundant number, since it is smaller than the sum of its proper divisors (2101576560).

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

800321040 is a wasteful number, since it uses less digits than its factorization.

800321040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19542 (or 19530 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 800321040 is about 28289.9459172336. The cubic root of 800321040 is about 928.4419280886.

Adding to 800321040 its reverse (40123008), we get a palindrome (840444048).

The spelling of 800321040 in words is "eight hundred million, three hundred twenty-one thousand, forty".