139068144 has 80 divisors (see below), whose sum is σ = 420211200. Its totient is φ = 43913664.

The previous prime is 139068113. The next prime is 139068151. The reversal of 139068144 is 441860931.

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

It is a junction number, because it is equal to n+sod(n) for n = 139068099 and 139068108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264 + ... + 16679.

It is an arithmetic number, because the mean of its divisors is an integer number (5252640).

Almost surely, 2^139068144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139068144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210105600).

139068144 is an abundant number, since it is smaller than the sum of its proper divisors (281143056).

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

139068144 is a wasteful number, since it uses less digits than its factorization.

139068144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16979 (or 16967 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 139068144 is about 11792.7157177641. The cubic root of 139068144 is about 518.0947834684.

The spelling of 139068144 in words is "one hundred thirty-nine million, sixty-eight thousand, one hundred forty-four".