2139186 has 48 divisors (see below), whose sum is σ = 5147712. Its totient is φ = 580320.

The previous prime is 2139167. The next prime is 2139199. The reversal of 2139186 is 6819312.

It is a super-2 number, since 2×2139186² = 9152233485192, which contains 22 as substring.

Its product of digits (2592) is a multiple of the sum of its prime divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40336 + ... + 40388.

It is an arithmetic number, because the mean of its divisors is an integer number (107244).

2^2139186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2573856).

2139186 is an abundant number, since it is smaller than the sum of its proper divisors (3008526).

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

2139186 is a wasteful number, since it uses less digits than its factorization.

2139186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 96 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 2139186 is about 1462.5956378986. The cubic root of 2139186 is about 128.8495331133.

The spelling of 2139186 in words is "two million, one hundred thirty-nine thousand, one hundred eighty-six".