765000000 has 336 divisors, whose sum is σ = 2902141008. Its totient is φ = 192000000.

The previous prime is 764999981. The next prime is 765000001. The reversal of 765000000 is 567.

It can be written as a sum of positive squares in 8 ways, for example, as 675584064 + 89415936 = 25992^2 + 9456^2 .

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765000001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44999992 + ... + 45000008.

Almost surely, 2^765000000 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 765000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451070504).

765000000 is an abundant number, since it is smaller than the sum of its proper divisors (2137141008).

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

765000000 is an frugal number, since it uses more digits than its factorization.

765000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 765000000 is about 27658.6333718787. The cubic root of 765000000 is about 914.5774273771.

Adding to 765000000 its reverse (567), we get a palindrome (765000567).

The spelling of 765000000 in words is "seven hundred sixty-five million", and thus it is an aban number.