2040138 has 12 divisors (see below), whose sum is σ = 4420338. Its totient is φ = 680040.

The previous prime is 2040133. The next prime is 2040149. The reversal of 2040138 is 8310402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1912689 + 127449 = 1383^2 + 357^2 .

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 113341 = 2040138 / (2 + 0 + 4 + 0 + 1 + 3 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 2040138.

It is not an unprimeable number, because it can be changed into a prime (2040133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56653 + ... + 56688.

2^2040138 is an apocalyptic number.

2040138 is an abundant number, since it is smaller than the sum of its proper divisors (2380200).

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

2040138 is a wasteful number, since it uses less digits than its factorization.

2040138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113349 (or 113346 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2040138 is about 1428.3339945545. Note that the first 3 decimals coincide. The cubic root of 2040138 is about 126.8293738568.

The spelling of 2040138 in words is "two million, forty thousand, one hundred thirty-eight".