788478660 has 36 divisors (see below), whose sum is σ = 2391719148. Its totient is φ = 210260928.

The previous prime is 788478637. The next prime is 788478661. The reversal of 788478660 is 66874887.

It can be written as a sum of positive squares in 2 ways, for example, as 538332804 + 250145856 = 23202^2 + 15816^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 788478597 and 788478606.

It is not an unprimeable number, because it can be changed into a prime (788478661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2190039 + ... + 2190398.

It is an arithmetic number, because the mean of its divisors is an integer number (66436643).

Almost surely, 2^788478660 is an apocalyptic number.

It is an amenable number.

788478660 is an abundant number, since it is smaller than the sum of its proper divisors (1603240488).

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

788478660 is a wasteful number, since it uses less digits than its factorization.

788478660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4380452 (or 4380447 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The square root of 788478660 is about 28079.8621791490. The cubic root of 788478660 is about 923.8397568859.

The spelling of 788478660 in words is "seven hundred eighty-eight million, four hundred seventy-eight thousand, six hundred sixty".