678068938 has 8 divisors (see below), whose sum is σ = 1020122532. Its totient is φ = 338028096.

The previous prime is 678068933. The next prime is 678068971. The reversal of 678068938 is 839860876.

It can be written as a sum of positive squares in 2 ways, for example, as 606784689 + 71284249 = 24633^2 + 8443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (678068933) 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, 502345 + ... + 503692.

Almost surely, 2^678068938 is an apocalyptic number.

678068938 is a deficient number, since it is larger than the sum of its proper divisors (342053594).

678068938 is a wasteful number, since it uses less digits than its factorization.

678068938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006376.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 678068938 is about 26039.7568729049. The cubic root of 678068938 is about 878.5327382992.

The spelling of 678068938 in words is "six hundred seventy-eight million, sixty-eight thousand, nine hundred thirty-eight".