775764 has 48 divisors (see below), whose sum is σ = 2197440. Its totient is φ = 234720.

The previous prime is 775757. The next prime is 775777. The reversal of 775764 is 467577.

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.

775764 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862 + ... + 1514.

It is an arithmetic number, because the mean of its divisors is an integer number (45780).

2⁷⁷⁵⁷⁶⁴ 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 775764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1098720).

775764 is an abundant number, since it is smaller than the sum of its proper divisors (1421676).

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

775764 is a wasteful number, since it uses less digits than its factorization.

775764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677 (or 669 counting only the distinct ones).

The product of its digits is 41160, while the sum is 36.

The square root of 775764 is about 880.7746590360. The cubic root of 775764 is about 91.8847011830.

The spelling of 775764 in words is "seven hundred seventy-five thousand, seven hundred sixty-four".