It is a happy number.
2345678 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is a sphenic number, since it is the product of 3 distinct primes.
It is an alternating number because its digits alternate between even and odd.
It is a straight-line number, since its digits are in arithmetic progression.
It is a plaindrome in base 10.
It is a congruent number.
It is an unprimeable number.
It is an upside-down number.
22345678 is an apocalyptic number.
2345678 is a wasteful number, since it uses less digits than its factorization.
2345678 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 51018.
The square root of 2345678 is about 1531.5606419597. The cubic root of 2345678 is about 132.8687343778.
The spelling of 2345678 in words is "two million, three hundred forty-five thousand, six hundred seventy-eight".