2138636 has 6 divisors (see below), whose sum is σ = 3742620. Its totient is φ = 1069316.

The previous prime is 2138629. The next prime is 2138657. The reversal of 2138636 is 6368312.

It is a junction number, because it is equal to n+sod(n) for n = 2138599 and 2138608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267326 + ... + 267333.

It is an arithmetic number, because the mean of its divisors is an integer number (623770).

2^2138636 is an apocalyptic number.

It is an amenable number.

2138636 is a deficient number, since it is larger than the sum of its proper divisors (1603984).

2138636 is a wasteful number, since it uses less digits than its factorization.

2138636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534663 (or 534661 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 2138636 is about 1462.4076039190. The cubic root of 2138636 is about 128.8384894550.

The spelling of 2138636 in words is "two million, one hundred thirty-eight thousand, six hundred thirty-six".