139128770 has 16 divisors (see below), whose sum is σ = 273198528. Its totient is φ = 50592240.

The previous prime is 139128767. The next prime is 139128827. The reversal of 139128770 is 77821931.

139128770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632294 + ... + 632513.

It is an arithmetic number, because the mean of its divisors is an integer number (17074908).

Almost surely, 2^139128770 is an apocalyptic number.

139128770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139128770 is a deficient number, since it is larger than the sum of its proper divisors (134069758).

139128770 is a wasteful number, since it uses less digits than its factorization.

139128770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264825.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 139128770 is about 11795.2859227744. The cubic root of 139128770 is about 518.1700593972.

The spelling of 139128770 in words is "one hundred thirty-nine million, one hundred twenty-eight thousand, seven hundred seventy".