68394880 has 32 divisors (see below), whose sum is σ = 163508040. Its totient is φ = 27357696.

The previous prime is 68394817. The next prime is 68394881. The reversal of 68394880 is 8849386.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×68394880² = 9355719220428800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68394880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68394881) 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 3 ways as a sum of consecutive naturals, for example, 52794 + ... + 54073.

Almost surely, 2^68394880 is an apocalyptic number.

It is an amenable number.

68394880 is an abundant number, since it is smaller than the sum of its proper divisors (95113160).

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

68394880 is a wasteful number, since it uses less digits than its factorization.

68394880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106886 (or 106874 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 68394880 is about 8270.1197089280. The cubic root of 68394880 is about 408.9540661347.

The spelling of 68394880 in words is "sixty-eight million, three hundred ninety-four thousand, eight hundred eighty".