678213916 has 12 divisors (see below), whose sum is σ = 1201174632. Its totient is φ = 335021168.

The previous prime is 678213871. The next prime is 678213919. The reversal of 678213916 is 619312876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678213919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021075 + ... + 1021738.

It is an arithmetic number, because the mean of its divisors is an integer number (100097886).

Almost surely, 2^678213916 is an apocalyptic number.

It is an amenable number.

678213916 is a deficient number, since it is larger than the sum of its proper divisors (522960716).

678213916 is a wasteful number, since it uses less digits than its factorization.

678213916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042900 (or 2042898 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 678213916 is about 26042.5405058723. The cubic root of 678213916 is about 878.5953469002.

The spelling of 678213916 in words is "six hundred seventy-eight million, two hundred thirteen thousand, nine hundred sixteen".