139103728 has 10 divisors (see below), whose sum is σ = 269513504. Its totient is φ = 69551856.

The previous prime is 139103719. The next prime is 139103759. The reversal of 139103728 is 827301931.

It is a junction number, because it is equal to n+sod(n) for n = 139103693 and 139103702.

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, 4346976 + ... + 4347007.

Almost surely, 2^139103728 is an apocalyptic number.

It is an amenable number.

139103728 is a deficient number, since it is larger than the sum of its proper divisors (130409776).

139103728 is an equidigital number, since it uses as much as digits as its factorization.

139103728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8693991 (or 8693985 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 139103728 is about 11794.2243492313. The cubic root of 139103728 is about 518.1389687914.

The spelling of 139103728 in words is "one hundred thirty-nine million, one hundred three thousand, seven hundred twenty-eight".