139218120 has 96 divisors (see below), whose sum is σ = 454446720. Its totient is φ = 36961920.

The previous prime is 139218061. The next prime is 139218143. The reversal of 139218120 is 21812931.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96847 + ... + 98273.

It is an arithmetic number, because the mean of its divisors is an integer number (4733820).

Almost surely, 2^139218120 is an apocalyptic number.

139218120 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 139218120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227223360).

139218120 is an abundant number, since it is smaller than the sum of its proper divisors (315228600).

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

139218120 is a wasteful number, since it uses less digits than its factorization.

139218120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715 (or 1708 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 139218120 is about 11799.0728449315. The cubic root of 139218120 is about 518.2809604644.

The spelling of 139218120 in words is "one hundred thirty-nine million, two hundred eighteen thousand, one hundred twenty".