2138986 has 8 divisors (see below), whose sum is σ = 3263040. Its totient is φ = 1051308.

The previous prime is 2138971. The next prime is 2138987. The reversal of 2138986 is 6898312.

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

It is a super-2 number, since 2×2138986² = 9150522216392, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2138987) 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, 8946 + ... + 9181.

It is an arithmetic number, because the mean of its divisors is an integer number (407880).

2^2138986 is an apocalyptic number.

2138986 is a deficient number, since it is larger than the sum of its proper divisors (1124054).

2138986 is a wasteful number, since it uses less digits than its factorization.

2138986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18188.

The product of its digits is 20736, while the sum is 37.

The square root of 2138986 is about 1462.5272647031. The cubic root of 2138986 is about 128.8455174566.

The spelling of 2138986 in words is "two million, one hundred thirty-eight thousand, nine hundred eighty-six".