780213814 has 4 divisors (see below), whose sum is σ = 1170320724. Its totient is φ = 390106906.

The previous prime is 780213809. The next prime is 780213821. The reversal of 780213814 is 418312087.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 780213814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195053452 + ... + 195053455.

It is an arithmetic number, because the mean of its divisors is an integer number (292580181).

Almost surely, 2^780213814 is an apocalyptic number.

780213814 is a deficient number, since it is larger than the sum of its proper divisors (390106910).

780213814 is a wasteful number, since it uses less digits than its factorization.

780213814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390106909.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 780213814 is about 27932.3077098904. The cubic root of 780213814 is about 920.6005113772.

The spelling of 780213814 in words is "seven hundred eighty million, two hundred thirteen thousand, eight hundred fourteen".