139408336 has 40 divisors (see below), whose sum is σ = 291588480. Its totient is φ = 64369536.

The previous prime is 139408309. The next prime is 139408343. The reversal of 139408336 is 633804931.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 139408295 and 139408304.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4141 + ... + 17203.

It is an arithmetic number, because the mean of its divisors is an integer number (7289712).

Almost surely, 2^139408336 is an apocalyptic number.

139408336 is a gapful number since it is divisible by the number (16) 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 139408336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145794240).

139408336 is an abundant number, since it is smaller than the sum of its proper divisors (152180144).

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

139408336 is a wasteful number, since it uses less digits than its factorization.

139408336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13123 (or 13117 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 139408336 is about 11807.1307268108. The cubic root of 139408336 is about 518.5168982998.

The spelling of 139408336 in words is "one hundred thirty-nine million, four hundred eight thousand, three hundred thirty-six".