139888 has 20 divisors (see below), whose sum is σ = 310000. Its totient is φ = 59904.

The previous prime is 139883. The next prime is 139891. The reversal of 139888 is 888931.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513 + ... + 736.

It is an arithmetic number, because the mean of its divisors is an integer number (15500).

2¹³⁹⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

139888 is an abundant number, since it is smaller than the sum of its proper divisors (170112).

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

139888 is a wasteful number, since it uses less digits than its factorization.

139888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264 (or 1258 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 139888 is about 374.0160424367. The cubic root of 139888 is about 51.9110906735.

The spelling of 139888 in words is "one hundred thirty-nine thousand, eight hundred eighty-eight".