765978 has 8 divisors (see below), whose sum is σ = 1531968. Its totient is φ = 255324.

The previous prime is 765971. The next prime is 765983. The reversal of 765978 is 879567.

It is a sphenic number, since it is the product of 3 distinct primes.

765978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (765971) by changing a digit.

765978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63826 + ... + 63837.

It is an arithmetic number, because the mean of its divisors is an integer number (191496).

2⁷⁶⁵⁹⁷⁸ is an apocalyptic number.

765978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

765978 is a wasteful number, since it uses less digits than its factorization.

765978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127668.

The product of its digits is 105840, while the sum is 42.

The square root of 765978 is about 875.2016910404. The cubic root of 765978 is about 91.4967002901.

The spelling of 765978 in words is "seven hundred sixty-five thousand, nine hundred seventy-eight".