775990 has 16 divisors (see below), whose sum is σ = 1417248. Its totient is φ = 305856.

The previous prime is 775987. The next prime is 776003. The reversal of 775990 is 99577.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199 + ... + 1261.

It is an arithmetic number, because the mean of its divisors is an integer number (88578).

2⁷⁷⁵⁹⁹⁰ is an apocalyptic number.

775990 is a deficient number, since it is larger than the sum of its proper divisors (641258).

775990 is a wasteful number, since it uses less digits than its factorization.

775990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143.

The product of its (nonzero) digits is 19845, while the sum is 37.

The square root of 775990 is about 880.9029458459. The cubic root of 775990 is about 91.8936231087.

The spelling of 775990 in words is "seven hundred seventy-five thousand, nine hundred ninety".