139886028 has 60 divisors (see below), whose sum is σ = 369542712. Its totient is φ = 46137600.

The previous prime is 139885997. The next prime is 139886039. The reversal of 139886028 is 820688931.

139886028 is a `hidden beast` number, since 1 + 39 + 8 + 8 + 602 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29203 + ... + 33653.

Almost surely, 2^139886028 is an apocalyptic number.

139886028 is a gapful number since it is divisible by the number (18) 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 139886028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184771356).

139886028 is an abundant number, since it is smaller than the sum of its proper divisors (229656684).

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

139886028 is a wasteful number, since it uses less digits than its factorization.

139886028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564 (or 4553 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 139886028 is about 11827.3423895650. The cubic root of 139886028 is about 519.1084674227.

The spelling of 139886028 in words is "one hundred thirty-nine million, eight hundred eighty-six thousand, twenty-eight".