2138266 has 8 divisors (see below), whose sum is σ = 3454164. Its totient is φ = 986880.

The previous prime is 2138263. The next prime is 2138291. The reversal of 2138266 is 6628312.

It can be written as a sum of positive squares in 2 ways, for example, as 2019241 + 119025 = 1421^2 + 345^2 .

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

It is a d-powerful number, because it can be written as 2¹³ + 1 + 3⁴ + 8⁵ + 2²¹ + 6² + 6² .

It is not an unprimeable number, because it can be changed into a prime (2138263) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 41095 + ... + 41146.

2^2138266 is an apocalyptic number.

2138266 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2138266 is a deficient number, since it is larger than the sum of its proper divisors (1315898).

2138266 is a wasteful number, since it uses less digits than its factorization.

2138266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82256.

The product of its digits is 3456, while the sum is 28.

The square root of 2138266 is about 1462.2810947284. The cubic root of 2138266 is about 128.8310590196.

The spelling of 2138266 in words is "two million, one hundred thirty-eight thousand, two hundred sixty-six".