68386440 has 32 divisors (see below), whose sum is σ = 205159680. Its totient is φ = 18236352.

The previous prime is 68386433. The next prime is 68386447. The reversal of 68386440 is 4468386.

It is an interprime number because it is at equal distance from previous prime (68386433) and next prime (68386447).

It is not an unprimeable number, because it can be changed into a prime (68386447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284824 + ... + 285063.

It is an arithmetic number, because the mean of its divisors is an integer number (6411240).

Almost surely, 2^68386440 is an apocalyptic number.

68386440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68386440 is an abundant number, since it is smaller than the sum of its proper divisors (136773240).

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

68386440 is a wasteful number, since it uses less digits than its factorization.

68386440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569901 (or 569897 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 68386440 is about 8269.6094224576. The cubic root of 68386440 is about 408.9372436556.

The spelling of 68386440 in words is "sixty-eight million, three hundred eighty-six thousand, four hundred forty".