139428055 has 8 divisors (see below), whose sum is σ = 180184032. Its totient is φ = 102962208.

The previous prime is 139428053. The next prime is 139428077. The reversal of 139428055 is 550824931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139428055 - 2¹ = 139428053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139428053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072459 + ... + 1072588.

It is an arithmetic number, because the mean of its divisors is an integer number (22523004).

Almost surely, 2^139428055 is an apocalyptic number.

139428055 is a deficient number, since it is larger than the sum of its proper divisors (40755977).

139428055 is a wasteful number, since it uses less digits than its factorization.

139428055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145065.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 139428055 is about 11807.9657435140. The cubic root of 139428055 is about 518.5413448357.

The spelling of 139428055 in words is "one hundred thirty-nine million, four hundred twenty-eight thousand, fifty-five".