780028 has 12 divisors (see below), whose sum is σ = 1445472. Its totient is φ = 367040.

The previous prime is 779993. The next prime is 780029. The reversal of 780028 is 820087.

It is a junction number, because it is equal to n+sod(n) for n = 779984 and 780011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5668 + ... + 5803.

It is an arithmetic number, because the mean of its divisors is an integer number (120456).

2⁷⁸⁰⁰²⁸ is an apocalyptic number.

It is an amenable number.

780028 is a deficient number, since it is larger than the sum of its proper divisors (665444).

780028 is a wasteful number, since it uses less digits than its factorization.

780028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11492 (or 11490 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 780028 is about 883.1919383690. The cubic root of 780028 is about 92.0527422846.

The spelling of 780028 in words is "seven hundred eighty thousand, twenty-eight".