771940 has 24 divisors (see below), whose sum is σ = 1746360. Its totient is φ = 284928.

The previous prime is 771937. The next prime is 771941. The reversal of 771940 is 49177.

It can be written as a sum of positive squares in 4 ways, for example, as 39204 + 732736 = 198^2 + 856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 771899 and 771908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771941) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1225 + ... + 1744.

It is an arithmetic number, because the mean of its divisors is an integer number (72765).

2⁷⁷¹⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

771940 is an abundant number, since it is smaller than the sum of its proper divisors (974420).

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

771940 is a wasteful number, since it uses less digits than its factorization.

771940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991 (or 2989 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 771940 is about 878.6011609371. The cubic root of 771940 is about 91.7334756304.

It can be divided in two parts, 771 and 940, that added together give a triangular number (1711 = T₅₈).

The spelling of 771940 in words is "seven hundred seventy-one thousand, nine hundred forty".