139228 has 6 divisors (see below), whose sum is σ = 243656. Its totient is φ = 69612.

The previous prime is 139201. The next prime is 139241. The reversal of 139228 is 822931.

It is a congruent number.

It is an unprimeable number.

139228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17400 + ... + 17407.

2¹³⁹²²⁸ is an apocalyptic number.

It is an amenable number.

139228 is a deficient number, since it is larger than the sum of its proper divisors (104428).

139228 is a wasteful number, since it uses less digits than its factorization.

139228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34811 (or 34809 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 139228 is about 373.1326841755. The cubic root of 139228 is about 51.8293220590.

The spelling of 139228 in words is "one hundred thirty-nine thousand, two hundred twenty-eight".