139589856 has 144 divisors (see below), whose sum is σ = 480471264. Its totient is φ = 37527552.

The previous prime is 139589843. The next prime is 139589861. The reversal of 139589856 is 658985931.

It is a happy number.

139589856 is a `hidden beast` number, since 1 + 3 + 9 + 589 + 8 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32236 + ... + 36308.

It is an arithmetic number, because the mean of its divisors is an integer number (3336606).

Almost surely, 2^139589856 is an apocalyptic number.

139589856 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 139589856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240235632).

139589856 is an abundant number, since it is smaller than the sum of its proper divisors (340881408).

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

139589856 is a wasteful number, since it uses less digits than its factorization.

139589856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113 (or 4102 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 139589856 is about 11814.8151064670. The cubic root of 139589856 is about 518.7418498550.

The spelling of 139589856 in words is "one hundred thirty-nine million, five hundred eighty-nine thousand, eight hundred fifty-six".