8207390920 has 32 divisors (see below), whose sum is σ = 19103412600. Its totient is φ = 3169750528.

The previous prime is 8207390899. The next prime is 8207390927. The reversal of 8207390920 is 290937028.

It can be written as a sum of positive squares in 4 ways, for example, as 4440623044 + 3766767876 = 66638^2 + 61374^2 .

It is a super-2 number, since 2×8207390920² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (8207390927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3536509 + ... + 3538828.

Almost surely, 2^8207390920 is an apocalyptic number.

It is an amenable number.

8207390920 is an abundant number, since it is smaller than the sum of its proper divisors (10896021680).

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

8207390920 is a wasteful number, since it uses less digits than its factorization.

8207390920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7075377 (or 7075373 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 8207390920 is about 90594.6517185203. The cubic root of 8207390920 is about 2017.1353473290.

The spelling of 8207390920 in words is "eight billion, two hundred seven million, three hundred ninety thousand, nine hundred twenty".