139128320 has 40 divisors (see below), whose sum is σ = 333588024. Its totient is φ = 55650304.

The previous prime is 139128281. The next prime is 139128331. The reversal of 139128320 is 23821931.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24614 + ... + 29733.

Almost surely, 2^139128320 is an apocalyptic number.

139128320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139128320 is an abundant number, since it is smaller than the sum of its proper divisors (194459704).

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

139128320 is an frugal number, since it uses more digits than its factorization.

139128320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54370 (or 54354 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 139128320 is about 11795.2668473418. The cubic root of 139128320 is about 518.1695007378.

The spelling of 139128320 in words is "one hundred thirty-nine million, one hundred twenty-eight thousand, three hundred twenty".