123778678 has 8 divisors (see below), whose sum is σ = 187023672. Its totient is φ = 61437456.

The previous prime is 123778657. The next prime is 123778703. The reversal of 123778678 is 876877321.

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

It is a super-3 number, since 3×123778678³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225600 + ... + 226147.

It is an arithmetic number, because the mean of its divisors is an integer number (23377959).

Almost surely, 2^123778678 is an apocalyptic number.

123778678 is a deficient number, since it is larger than the sum of its proper divisors (63244994).

123778678 is a wasteful number, since it uses less digits than its factorization.

123778678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451886.

The product of its digits is 790272, while the sum is 49.

The square root of 123778678 is about 11125.5866362183. The cubic root of 123778678 is about 498.3662381253.

The spelling of 123778678 in words is "one hundred twenty-three million, seven hundred seventy-eight thousand, six hundred seventy-eight".