775320 has 128 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 161280.

The previous prime is 775309. The next prime is 775343. The reversal of 775320 is 23577.

775320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×775320² = 1202242204800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 10.

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, 10885 + ... + 10955.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2⁷⁷⁵³²⁰ is an apocalyptic number.

775320 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 775320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451520).

775320 is an abundant number, since it is smaller than the sum of its proper divisors (2127720).

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

775320 is a wasteful number, since it uses less digits than its factorization.

775320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 24.

The square root of 775320 is about 880.5225721127. The cubic root of 775320 is about 91.8671681047.

Adding to 775320 its reverse (23577), we get a palindrome (798897).

The spelling of 775320 in words is "seven hundred seventy-five thousand, three hundred twenty".