780002 has 4 divisors (see below), whose sum is σ = 1170006. Its totient is φ = 390000.

The previous prime is 779993. The next prime is 780029. The reversal of 780002 is 200087.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 421201 + 358801 = 649^2 + 599^2 .

It is an unprimeable number.

780002 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 as a sum of consecutive naturals, namely, 194999 + ... + 195002.

2⁷⁸⁰⁰⁰² is an apocalyptic number.

780002 is a deficient number, since it is larger than the sum of its proper divisors (390004).

780002 is a wasteful number, since it uses less digits than its factorization.

780002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390003.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 780002 is about 883.1772189091. The cubic root of 780002 is about 92.0517195017.

Adding to 780002 its reverse (200087), we get a palindrome (980089).

The spelling of 780002 in words is "seven hundred eighty thousand, two".