68055140 has 24 divisors (see below), whose sum is σ = 143566080. Its totient is φ = 27098208.

The previous prime is 68055139. The next prime is 68055149. The reversal of 68055140 is 4155086.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68055149) 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, 3170 + ... + 12089.

It is an arithmetic number, because the mean of its divisors is an integer number (5981920).

Almost surely, 2^68055140 is an apocalyptic number.

It is an amenable number.

68055140 is an abundant number, since it is smaller than the sum of its proper divisors (75510940).

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

68055140 is a wasteful number, since it uses less digits than its factorization.

68055140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15491 (or 15489 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 68055140 is about 8249.5539273345. The cubic root of 68055140 is about 408.2758051215.

The spelling of 68055140 in words is "sixty-eight million, fifty-five thousand, one hundred forty".