139428078 has 16 divisors (see below), whose sum is σ = 278993280. Its totient is φ = 46453176.

The previous prime is 139428077. The next prime is 139428083. The reversal of 139428078 is 870824931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139428077) 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, 11493 + ... + 20271.

It is an arithmetic number, because the mean of its divisors is an integer number (17437080).

Almost surely, 2^139428078 is an apocalyptic number.

139428078 is an abundant number, since it is smaller than the sum of its proper divisors (139565202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139428078 is a wasteful number, since it uses less digits than its factorization.

139428078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11431.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 139428078 is about 11807.9667174328. The cubic root of 139428078 is about 518.5413733485.

The spelling of 139428078 in words is "one hundred thirty-nine million, four hundred twenty-eight thousand, seventy-eight".