780478 has 16 divisors (see below), whose sum is σ = 1231200. Its totient is φ = 370656.

The previous prime is 780469. The next prime is 780499. The reversal of 780478 is 874087.

It is a congruent number.

It is an unprimeable number.

780478 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 3823 + ... + 4021.

It is an arithmetic number, because the mean of its divisors is an integer number (76950).

2⁷⁸⁰⁴⁷⁸ is an apocalyptic number.

780478 is a deficient number, since it is larger than the sum of its proper divisors (450722).

780478 is a wasteful number, since it uses less digits than its factorization.

780478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 780478 is about 883.4466593972. The cubic root of 780478 is about 92.0704406966.

The spelling of 780478 in words is "seven hundred eighty thousand, four hundred seventy-eight".