678367768 has 64 divisors (see below), whose sum is σ = 1455552000. Its totient is φ = 294077952.

The previous prime is 678367759. The next prime is 678367771. The reversal of 678367768 is 867763876.

It is a happy number.

It is a super-2 number, since 2×678367768² = 920365657322603648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108553 + ... + 114631.

It is an arithmetic number, because the mean of its divisors is an integer number (22743000).

Almost surely, 2^678367768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678367768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (727776000).

678367768 is an abundant number, since it is smaller than the sum of its proper divisors (777184232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678367768 is a wasteful number, since it uses less digits than its factorization.

678367768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6164 (or 6160 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 58.

The square root of 678367768 is about 26045.4941976535. The cubic root of 678367768 is about 878.6617779716.

The spelling of 678367768 in words is "six hundred seventy-eight million, three hundred sixty-seven thousand, seven hundred sixty-eight".