7686780420 has 96 divisors (see below), whose sum is σ = 23513132160. Its totient is φ = 1860802560.

The previous prime is 7686780371. The next prime is 7686780427. The reversal of 7686780420 is 240876867.

It is a self number, because there is not a number n which added to its sum of digits gives 7686780420.

It is not an unprimeable number, because it can be changed into a prime (7686780427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 475836 + ... + 491724.

It is an arithmetic number, because the mean of its divisors is an integer number (244928460).

Almost surely, 2^7686780420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7686780420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11756566080).

7686780420 is an abundant number, since it is smaller than the sum of its proper divisors (15826351740).

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

7686780420 is a wasteful number, since it uses less digits than its factorization.

7686780420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16645 (or 16643 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 7686780420 is about 87674.2859680077. The cubic root of 7686780420 is about 1973.5501120684.

The spelling of 7686780420 in words is "seven billion, six hundred eighty-six million, seven hundred eighty thousand, four hundred twenty".