139944408 has 64 divisors (see below), whose sum is σ = 375736320. Its totient is φ = 43276800.

The previous prime is 139944383. The next prime is 139944421. The reversal of 139944408 is 804449931.

It is a self number, because there is not a number n which added to its sum of digits gives 139944408.

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 15 ways as a sum of consecutive naturals, for example, 26553 + ... + 31383.

It is an arithmetic number, because the mean of its divisors is an integer number (5870880).

Almost surely, 2^139944408 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 139944408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187868160).

139944408 is an abundant number, since it is smaller than the sum of its proper divisors (235791912).

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

139944408 is a wasteful number, since it uses less digits than its factorization.

139944408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4928 (or 4924 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 139944408 is about 11829.8101421790. The cubic root of 139944408 is about 519.1806722450.

The spelling of 139944408 in words is "one hundred thirty-nine million, nine hundred forty-four thousand, four hundred eight".