139085568 has 216 divisors, whose sum is σ = 439075728. Its totient is φ = 42172416.

The previous prime is 139085563. The next prime is 139085579. The reversal of 139085568 is 865580931.

139085568 is a `hidden beast` number, since 1 + 3 + 9 + 0 + 85 + 568 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139085563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2075871 + ... + 2075937.

It is an arithmetic number, because the mean of its divisors is an integer number (2032758).

Almost surely, 2^139085568 is an apocalyptic number.

139085568 is a gapful number since it is divisible by the number (18) 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 139085568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219537864).

139085568 is an abundant number, since it is smaller than the sum of its proper divisors (299990160).

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

139085568 is a wasteful number, since it uses less digits than its factorization.

139085568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 139085568 is about 11793.4544557564. The cubic root of 139085568 is about 518.1164201190.

The spelling of 139085568 in words is "one hundred thirty-nine million, eighty-five thousand, five hundred sixty-eight".