68478816 has 96 divisors (see below), whose sum is σ = 206938368. Its totient is φ = 19422720.

The previous prime is 68478811. The next prime is 68478821. The reversal of 68478816 is 61887486.

It is an interprime number because it is at equal distance from previous prime (68478811) and next prime (68478821).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68478811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121351 + ... + 121913.

It is an arithmetic number, because the mean of its divisors is an integer number (2155608).

Almost surely, 2^68478816 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 68478816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103469184).

68478816 is an abundant number, since it is smaller than the sum of its proper divisors (138459552).

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

68478816 is a wasteful number, since it uses less digits than its factorization.

68478816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 756 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 68478816 is about 8275.1928074215. The cubic root of 68478816 is about 409.1212908166.

The spelling of 68478816 in words is "sixty-eight million, four hundred seventy-eight thousand, eight hundred sixteen".