168423408 has 160 divisors (see below), whose sum is σ = 510592320. Its totient is φ = 53084160.

The previous prime is 168423407. The next prime is 168423433. The reversal of 168423408 is 804324861.

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 (168423407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 655216 + ... + 655472.

It is an arithmetic number, because the mean of its divisors is an integer number (3191202).

Almost surely, 2^168423408 is an apocalyptic number.

168423408 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 168423408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255296160).

168423408 is an abundant number, since it is smaller than the sum of its proper divisors (342168912).

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

168423408 is a wasteful number, since it uses less digits than its factorization.

168423408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 168423408 is about 12977.8044368067. The cubic root of 168423408 is about 552.2479982055.

The spelling of 168423408 in words is "one hundred sixty-eight million, four hundred twenty-three thousand, four hundred eight".