765049220 has 48 divisors (see below), whose sum is σ = 1734082560. Its totient is φ = 281844096.

The previous prime is 765049183. The next prime is 765049267. The reversal of 765049220 is 22940567.

765049220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121469 + ... + 127611.

It is an arithmetic number, because the mean of its divisors is an integer number (36126720).

Almost surely, 2^765049220 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 765049220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (867041280).

765049220 is an abundant number, since it is smaller than the sum of its proper divisors (969033340).

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

765049220 is a wasteful number, since it uses less digits than its factorization.

765049220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6644 (or 6642 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 765049220 is about 27659.5231339949. The cubic root of 765049220 is about 914.5970415538.

Adding to 765049220 its reverse (22940567), we get a palindrome (787989787).

The spelling of 765049220 in words is "seven hundred sixty-five million, forty-nine thousand, two hundred twenty".