68139000 has 192 divisors, whose sum is σ = 235815840. Its totient is φ = 17740800.

The previous prime is 68138999. The next prime is 68139083. The reversal of 68139000 is 93186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 602944 + ... + 603056.

Almost surely, 2^68139000 is an apocalyptic number.

68139000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68139000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117907920).

68139000 is an abundant number, since it is smaller than the sum of its proper divisors (167676840).

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

68139000 is a wasteful number, since it uses less digits than its factorization.

68139000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 68139000 is about 8254.6350615881. The cubic root of 68139000 is about 408.4434336823.

The spelling of 68139000 in words is "sixty-eight million, one hundred thirty-nine thousand".