780004 has 12 divisors (see below), whose sum is σ = 1378300. Its totient is φ = 386208.

The previous prime is 779993. The next prime is 780029. The reversal of 780004 is 400087.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 656100 + 123904 = 810^2 + 352^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459 + ... + 1330.

2⁷⁸⁰⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

780004 is a deficient number, since it is larger than the sum of its proper divisors (598296).

780004 is a wasteful number, since it uses less digits than its factorization.

780004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902 (or 1900 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 780004 is about 883.1783511839. The cubic root of 780004 is about 92.0517981781.

The spelling of 780004 in words is "seven hundred eighty thousand, four".