68256384 has 128 divisors (see below), whose sum is σ = 210854400. Its totient is φ = 19160064.

The previous prime is 68256337. The next prime is 68256439. The reversal of 68256384 is 48365286.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179907 + ... + 180285.

It is an arithmetic number, because the mean of its divisors is an integer number (1647300).

Almost surely, 2^68256384 is an apocalyptic number.

68256384 is a gapful number since it is divisible by the number (64) 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 68256384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105427200).

68256384 is an abundant number, since it is smaller than the sum of its proper divisors (142598016).

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

68256384 is a wasteful number, since it uses less digits than its factorization.

68256384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 458 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 68256384 is about 8261.7421891511. The cubic root of 68256384 is about 408.6778428492.

The spelling of 68256384 in words is "sixty-eight million, two hundred fifty-six thousand, three hundred eighty-four".