2138686 has 8 divisors (see below), whose sum is σ = 3499704. Its totient is φ = 972120.

The previous prime is 2138677. The next prime is 2138687. The reversal of 2138686 is 6868312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48585 + ... + 48628.

It is an arithmetic number, because the mean of its divisors is an integer number (437463).

2^2138686 is an apocalyptic number.

2138686 is a deficient number, since it is larger than the sum of its proper divisors (1361018).

2138686 is a wasteful number, since it uses less digits than its factorization.

2138686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97226.

The product of its digits is 13824, while the sum is 34.

The square root of 2138686 is about 1462.4246989162. The cubic root of 2138686 is about 128.8394935022.

The spelling of 2138686 in words is "two million, one hundred thirty-eight thousand, six hundred eighty-six".