771232320 has 224 divisors, whose sum is σ = 2839760640. Its totient is φ = 196669440.

The previous prime is 771232289. The next prime is 771232327. The reversal of 771232320 is 23232177.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (771232327) 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, 196780 + ... + 200660.

Almost surely, 2^771232320 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 771232320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1419880320).

771232320 is an abundant number, since it is smaller than the sum of its proper divisors (2068528320).

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

771232320 is a wasteful number, since it uses less digits than its factorization.

771232320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930 (or 3914 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 771232320 is about 27771.0698389529. The cubic root of 771232320 is about 917.0543467983.

Adding to 771232320 its reverse (23232177), we get a palindrome (794464497).

The spelling of 771232320 in words is "seven hundred seventy-one million, two hundred thirty-two thousand, three hundred twenty".