68145408 has 72 divisors (see below), whose sum is σ = 201538400. Its totient is φ = 22712832.

The previous prime is 68145377. The next prime is 68145433. The reversal of 68145408 is 80454186.

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1983 + ... + 11841.

Almost surely, 2^68145408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68145408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100769200).

68145408 is an abundant number, since it is smaller than the sum of its proper divisors (133392992).

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

68145408 is an equidigital number, since it uses as much as digits as its factorization.

68145408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9884 (or 9864 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 68145408 is about 8255.0231980292. The cubic root of 68145408 is about 408.4562370376.

The spelling of 68145408 in words is "sixty-eight million, one hundred forty-five thousand, four hundred eight".