678876394 has 16 divisors (see below), whose sum is σ = 1164240000. Its totient is φ = 290834064.

The previous prime is 678876391. The next prime is 678876397. The reversal of 678876394 is 493678876.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (678876391) and next prime (678876397).

It is not an unprimeable number, because it can be changed into a prime (678876391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35232 + ... + 50980.

It is an arithmetic number, because the mean of its divisors is an integer number (72765000).

Almost surely, 2^678876394 is an apocalyptic number.

678876394 is a deficient number, since it is larger than the sum of its proper divisors (485363606).

678876394 is a wasteful number, since it uses less digits than its factorization.

678876394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18837.

The product of its digits is 12192768, while the sum is 58.

The square root of 678876394 is about 26055.2565521816. The cubic root of 678876394 is about 878.8813238671.

The spelling of 678876394 in words is "six hundred seventy-eight million, eight hundred seventy-six thousand, three hundred ninety-four".