139844208 has 80 divisors (see below), whose sum is σ = 419703296. Its totient is φ = 39294720.

The previous prime is 139844207. The next prime is 139844239. The reversal of 139844208 is 802448931.

It is a super-2 number, since 2×139844208² = 39112805022294528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139844207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17085 + ... + 23907.

Almost surely, 2^139844208 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 139844208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209851648).

139844208 is an abundant number, since it is smaller than the sum of its proper divisors (279859088).

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

139844208 is a wasteful number, since it uses less digits than its factorization.

139844208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6902 (or 6896 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 139844208 is about 11825.5743200912. The cubic root of 139844208 is about 519.0567317820.

The spelling of 139844208 in words is "one hundred thirty-nine million, eight hundred forty-four thousand, two hundred eight".