775040 has 64 divisors (see below), whose sum is σ = 2129760. Its totient is φ = 264192.

The previous prime is 775037. The next prime is 775043. The reversal of 775040 is 40577.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (775037) and next prime (775043).

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 774997 and 775015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4394 + ... + 4566.

2⁷⁷⁵⁰⁴⁰ is an apocalyptic number.

775040 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 775040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1064880).

775040 is an abundant number, since it is smaller than the sum of its proper divisors (1354720).

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

775040 is a wasteful number, since it uses less digits than its factorization.

775040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 775040 is about 880.3635612632. The cubic root of 775040 is about 91.8561077665.

The spelling of 775040 in words is "seven hundred seventy-five thousand, forty".