139105680 has 160 divisors (see below), whose sum is σ = 508919808. Its totient is φ = 30758400.

The previous prime is 139105643. The next prime is 139105693. The reversal of 139105680 is 86501931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50745 + ... + 53415.

Almost surely, 2^139105680 is an apocalyptic number.

139105680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139105680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254459904).

139105680 is an abundant number, since it is smaller than the sum of its proper divisors (369814128).

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

139105680 is a wasteful number, since it uses less digits than its factorization.

139105680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725 (or 2719 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 139105680 is about 11794.3071013095. The cubic root of 139105680 is about 518.1413924086.

The spelling of 139105680 in words is "one hundred thirty-nine million, one hundred five thousand, six hundred eighty".