68740384 has 36 divisors (see below), whose sum is σ = 143780994. Its totient is φ = 32344064.

The previous prime is 68740381. The next prime is 68740387. The reversal of 68740384 is 48304786.

It is an interprime number because it is at equal distance from previous prime (68740381) and next prime (68740387).

It can be written as a sum of positive squares in 3 ways, for example, as 59907600 + 8832784 = 7740^2 + 2972^2 .

It is not an unprimeable number, because it can be changed into a prime (68740381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5532 + ... + 12964.

Almost surely, 2^68740384 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 68740384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71890497).

68740384 is an abundant number, since it is smaller than the sum of its proper divisors (75040610).

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

68740384 is a wasteful number, since it uses less digits than its factorization.

68740384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7477 (or 7452 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 68740384 is about 8290.9820889928. The cubic root of 68740384 is about 409.6415347896.

The spelling of 68740384 in words is "sixty-eight million, seven hundred forty thousand, three hundred eighty-four".