780628223 has 4 divisors (see below), whose sum is σ = 780684408. Its totient is φ = 780572040.

The previous prime is 780628187. The next prime is 780628279. The reversal of 780628223 is 322826087.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 780628223 - 2⁶ = 780628159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780628283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9665 + ... + 40677.

It is an arithmetic number, because the mean of its divisors is an integer number (195171102).

Almost surely, 2^780628223 is an apocalyptic number.

780628223 is a deficient number, since it is larger than the sum of its proper divisors (56185).

780628223 is a wasteful number, since it uses less digits than its factorization.

780628223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56184.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 780628223 is about 27939.7248196900. The cubic root of 780628223 is about 920.7634742323.

The spelling of 780628223 in words is "seven hundred eighty million, six hundred twenty-eight thousand, two hundred twenty-three".