139828 has 12 divisors (see below), whose sum is σ = 263620. Its totient is φ = 64512.

The previous prime is 139813. The next prime is 139831. The reversal of 139828 is 828931.

It can be written as a sum of positive squares in 2 ways, for example, as 11664 + 128164 = 108^2 + 358^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 139828.

It is a congruent number.

It is an unprimeable number.

139828 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1293 + ... + 1396.

2¹³⁹⁸²⁸ is an apocalyptic number.

It is an amenable number.

139828 is a deficient number, since it is larger than the sum of its proper divisors (123792).

139828 is a wasteful number, since it uses less digits than its factorization.

139828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706 (or 2704 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 139828 is about 373.9358233708. The cubic root of 139828 is about 51.9036678046.

The spelling of 139828 in words is "one hundred thirty-nine thousand, eight hundred twenty-eight".