123455808 has 168 divisors, whose sum is σ = 411349952. Its totient is φ = 34670592.

The previous prime is 123455803. The next prime is 123455809. The reversal of 123455808 is 808554321.

It is a happy number.

123455808 is a `hidden beast` number, since 123 + 455 + 80 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123455803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 269916 + ... + 270372.

Almost surely, 2^123455808 is an apocalyptic number.

123455808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123455808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205674976).

123455808 is an abundant number, since it is smaller than the sum of its proper divisors (287894144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123455808 is a wasteful number, since it uses less digits than its factorization.

123455808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 123455808 is about 11111.0669154677. The cubic root of 123455808 is about 497.9325403373.

The spelling of 123455808 in words is "one hundred twenty-three million, four hundred fifty-five thousand, eight hundred eight".