139068180 has 72 divisors (see below), whose sum is σ = 423095400. Its totient is φ = 36974592.

The previous prime is 139068179. The next prime is 139068199. The reversal of 139068180 is 81860931.

It can be written as a sum of positive squares in 4 ways, for example, as 38787984 + 100280196 = 6228^2 + 10014^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 72676 + ... + 74564.

It is an arithmetic number, because the mean of its divisors is an integer number (5876325).

Almost surely, 2^139068180 is an apocalyptic number.

139068180 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 139068180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211547700).

139068180 is an abundant number, since it is smaller than the sum of its proper divisors (284027220).

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

139068180 is a wasteful number, since it uses less digits than its factorization.

139068180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313 (or 2308 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 139068180 is about 11792.7172441300. The cubic root of 139068180 is about 518.0948281741.

The spelling of 139068180 in words is "one hundred thirty-nine million, sixty-eight thousand, one hundred eighty".