780955 has 16 divisors (see below), whose sum is σ = 1093824. Its totient is φ = 524160.

The previous prime is 780953. The next prime is 780961. The reversal of 780955 is 559087.

It is not a de Polignac number, because 780955 - 2¹ = 780953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 780955.

It is not an unprimeable number, because it can be changed into a prime (780953) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1645 + ... + 2065.

It is an arithmetic number, because the mean of its divisors is an integer number (68364).

2⁷⁸⁰⁹⁵⁵ is an apocalyptic number.

780955 is a deficient number, since it is larger than the sum of its proper divisors (312869).

780955 is a wasteful number, since it uses less digits than its factorization.

780955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 780955 is about 883.7165835266. The cubic root of 780955 is about 92.0891935875.

The spelling of 780955 in words is "seven hundred eighty thousand, nine hundred fifty-five".