771880320 has 256 divisors, whose sum is σ = 2878848000. Its totient is φ = 194918400.

The previous prime is 771880297. The next prime is 771880363. The reversal of 771880320 is 23088177.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 327145 + ... + 329495.

It is an arithmetic number, because the mean of its divisors is an integer number (11245500).

Almost surely, 2^771880320 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 771880320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439424000).

771880320 is an abundant number, since it is smaller than the sum of its proper divisors (2106967680).

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

771880320 is a wasteful number, since it uses less digits than its factorization.

771880320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 2380 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 771880320 is about 27782.7342066975. The cubic root of 771880320 is about 917.3111154555.

The spelling of 771880320 in words is "seven hundred seventy-one million, eight hundred eighty thousand, three hundred twenty".