123455678 has 8 divisors (see below), whose sum is σ = 186061800. Its totient is φ = 61435080.

The previous prime is 123455677. The next prime is 123455681. The reversal of 123455678 is 876554321.

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

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123455677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145853 + ... + 146696.

It is an arithmetic number, because the mean of its divisors is an integer number (23257725).

Almost surely, 2^123455678 is an apocalyptic number.

123455678 is a deficient number, since it is larger than the sum of its proper divisors (62606122).

123455678 is a wasteful number, since it uses less digits than its factorization.

123455678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292762.

The product of its digits is 201600, while the sum is 41.

The square root of 123455678 is about 11111.0610654428. The cubic root of 123455678 is about 497.9323655615.

The spelling of 123455678 in words is "one hundred twenty-three million, four hundred fifty-five thousand, six hundred seventy-eight".