765544340 has 96 divisors (see below), whose sum is σ = 1875291264. Its totient is φ = 259420160.

The previous prime is 765544337. The next prime is 765544361. The reversal of 765544340 is 43445567.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 765544294 and 765544303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 399224 + ... + 401136.

It is an arithmetic number, because the mean of its divisors is an integer number (19534284).

Almost surely, 2^765544340 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 765544340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (937645632).

765544340 is an abundant number, since it is smaller than the sum of its proper divisors (1109746924).

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

765544340 is a wasteful number, since it uses less digits than its factorization.

765544340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057 (or 2055 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 38.

The square root of 765544340 is about 27668.4719491337. The cubic root of 765544340 is about 914.7943001627.

The spelling of 765544340 in words is "seven hundred sixty-five million, five hundred forty-four thousand, three hundred forty".