139042928 has 20 divisors (see below), whose sum is σ = 272644008. Its totient is φ = 68683200.

The previous prime is 139042927. The next prime is 139042961. The reversal of 139042928 is 829240931.

It is a junction number, because it is equal to n+sod(n) for n = 139042891 and 139042900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139042927) 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, 51023 + ... + 53678.

Almost surely, 2^139042928 is an apocalyptic number.

It is an amenable number.

139042928 is a deficient number, since it is larger than the sum of its proper divisors (133601080).

139042928 is a wasteful number, since it uses less digits than its factorization.

139042928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104792 (or 104786 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 139042928 is about 11791.6465347296. The cubic root of 139042928 is about 518.0634677231.

The spelling of 139042928 in words is "one hundred thirty-nine million, forty-two thousand, nine hundred twenty-eight".