139207068 has 144 divisors (see below), whose sum is σ = 472582656. Its totient is φ = 33367680.

The previous prime is 139207049. The next prime is 139207093. The reversal of 139207068 is 860702931.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 34105 + ... + 37967.

It is an arithmetic number, because the mean of its divisors is an integer number (3281824).

Almost surely, 2^139207068 is an apocalyptic number.

139207068 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 139207068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236291328).

139207068 is an abundant number, since it is smaller than the sum of its proper divisors (333375588).

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

139207068 is a wasteful number, since it uses less digits than its factorization.

139207068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904 (or 3899 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 139207068 is about 11798.6044937526. The cubic root of 139207068 is about 518.2672453131.

Adding to 139207068 its reverse (860702931), we get a palindrome (999909999).

The spelling of 139207068 in words is "one hundred thirty-nine million, two hundred seven thousand, sixty-eight".