765479980 has 96 divisors (see below), whose sum is σ = 1756339200. Its totient is φ = 279272448.

The previous prime is 765479977. The next prime is 765479989. The reversal of 765479980 is 89974567.

It is not an unprimeable number, because it can be changed into a prime (765479989) 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, 1290564 + ... + 1291156.

It is an arithmetic number, because the mean of its divisors is an integer number (18295200).

Almost surely, 2^765479980 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 765479980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878169600).

765479980 is an abundant number, since it is smaller than the sum of its proper divisors (990859220).

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

765479980 is a wasteful number, since it uses less digits than its factorization.

765479980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 55.

The square root of 765479980 is about 27667.3088680486. The cubic root of 765479980 is about 914.7686635849.

The spelling of 765479980 in words is "seven hundred sixty-five million, four hundred seventy-nine thousand, nine hundred eighty".