2138508 has 24 divisors (see below), whose sum is σ = 5544560. Its totient is φ = 712800.

The previous prime is 2138503. The next prime is 2138527. The reversal of 2138508 is 8058312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2138501) 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 7 ways as a sum of consecutive naturals, for example, 9793 + ... + 10008.

2^2138508 is an apocalyptic number.

It is an amenable number.

2138508 is an abundant number, since it is smaller than the sum of its proper divisors (3406052).

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

2138508 is a wasteful number, since it uses less digits than its factorization.

2138508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19814 (or 19806 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2138508 is about 1462.3638398155. The cubic root of 2138508 is about 128.8359190230.

The spelling of 2138508 in words is "two million, one hundred thirty-eight thousand, five hundred eight".