820207340 has 24 divisors (see below), whose sum is σ = 1759084992. Its totient is φ = 321102080.

The previous prime is 820207291. The next prime is 820207343. The reversal of 820207340 is 43702028.

It is not an unprimeable number, because it can be changed into a prime (820207343) 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, 435341 + ... + 437220.

It is an arithmetic number, because the mean of its divisors is an integer number (73295208).

Almost surely, 2^820207340 is an apocalyptic number.

It is an amenable number.

820207340 is an abundant number, since it is smaller than the sum of its proper divisors (938877652).

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

820207340 is a wasteful number, since it uses less digits than its factorization.

820207340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872617 (or 872615 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 820207340 is about 28639.2622111674. The cubic root of 820207340 is about 936.0690451782.

Adding to 820207340 its reverse (43702028), we get a palindrome (863909368).

The spelling of 820207340 in words is "eight hundred twenty million, two hundred seven thousand, three hundred forty".