771328 has 36 divisors (see below), whose sum is σ = 1618848. Its totient is φ = 366080.

The previous prime is 771301. The next prime is 771349. The reversal of 771328 is 823177.

It is a happy number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 771296 and 771305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5823 + ... + 5953.

It is an arithmetic number, because the mean of its divisors is an integer number (44968).

2⁷⁷¹³²⁸ 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 771328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809424).

771328 is an abundant number, since it is smaller than the sum of its proper divisors (847520).

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

771328 is a wasteful number, since it uses less digits than its factorization.

771328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 156 counting only the distinct ones).

The product of its digits is 2352, while the sum is 28.

The square root of 771328 is about 878.2528109833. The cubic root of 771328 is about 91.7092268848.

The spelling of 771328 in words is "seven hundred seventy-one thousand, three hundred twenty-eight".