139032028 has 6 divisors (see below), whose sum is σ = 243306056. Its totient is φ = 69516012.

The previous prime is 139032017. The next prime is 139032041. The reversal of 139032028 is 820230931.

139032028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 139031987 and 139032005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17379000 + ... + 17379007.

Almost surely, 2^139032028 is an apocalyptic number.

It is an amenable number.

139032028 is a deficient number, since it is larger than the sum of its proper divisors (104274028).

139032028 is a wasteful number, since it uses less digits than its factorization.

139032028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34758011 (or 34758009 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 139032028 is about 11791.1843340692. The cubic root of 139032028 is about 518.0499298432.

Adding to 139032028 its reverse (820230931), we get a palindrome (959262959).

It can be divided in two parts, 13903 and 2028, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 139032028 in words is "one hundred thirty-nine million, thirty-two thousand, twenty-eight".