68393860 has 24 divisors (see below), whose sum is σ = 143783640. Its totient is φ = 27327744.

The previous prime is 68393807. The next prime is 68393887. The reversal of 68393860 is 6839386.

It can be written as a sum of positive squares in 4 ways, for example, as 3655744 + 64738116 = 1912^2 + 8046^2 .

It is a super-3 number, since 3×68393860³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31696 + ... + 33784.

It is an arithmetic number, because the mean of its divisors is an integer number (5990985).

Almost surely, 2^68393860 is an apocalyptic number.

It is an amenable number.

68393860 is an abundant number, since it is smaller than the sum of its proper divisors (75389780).

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

68393860 is a wasteful number, since it uses less digits than its factorization.

68393860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3735 (or 3733 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 68393860 is about 8270.0580409088. The cubic root of 68393860 is about 408.9520331598.

The spelling of 68393860 in words is "sixty-eight million, three hundred ninety-three thousand, eight hundred sixty".