139743408 has 80 divisors (see below), whose sum is σ = 421401600. Its totient is φ = 39072768.

The previous prime is 139743379. The next prime is 139743481. The reversal of 139743408 is 804347931.

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, 11368 + ... + 20216.

It is an arithmetic number, because the mean of its divisors is an integer number (5267520).

Almost surely, 2^139743408 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 139743408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210700800).

139743408 is an abundant number, since it is smaller than the sum of its proper divisors (281658192).

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

139743408 is a wasteful number, since it uses less digits than its factorization.

139743408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8914 (or 8908 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 139743408 is about 11821.3116023561. The cubic root of 139743408 is about 518.9319894101.

The spelling of 139743408 in words is "one hundred thirty-nine million, seven hundred forty-three thousand, four hundred eight".